Bump solhint from 2.1.0 to 2.3.0 (#1936)

* Bump solhint from 2.1.0 to 2.3.0

Bumps [solhint](https://github.com/protofire/solhint) from 2.1.0 to 2.3.0.
- [Release notes](https://github.com/protofire/solhint/releases)
- [Changelog](https://github.com/protofire/solhint/blob/master/CHANGELOG.md)
- [Commits](https://github.com/protofire/solhint/commits)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

* Fix linter

contracts/token/ERC777/ERC777.sol

@@ -28,7 +28,7 @@ contract ERC777 is Context, IERC777, IERC20 {
     using SafeMath for uint256;
     using Address for address;
 
-    IERC1820Registry constant private _erc1820 = IERC1820Registry(0x1820a4B7618BdE71Dce8cdc73aAB6C95905faD24);
+    IERC1820Registry constant private ERC1820_REGISTRY = IERC1820Registry(0x1820a4B7618BdE71Dce8cdc73aAB6C95905faD24);
 
     mapping(address => uint256) private _balances;
 
@@ -78,8 +78,8 @@ contract ERC777 is Context, IERC777, IERC20 {
         }
 
         // register interfaces
-        _erc1820.setInterfaceImplementer(address(this), keccak256("ERC777Token"), address(this));
-        _erc1820.setInterfaceImplementer(address(this), keccak256("ERC20Token"), address(this));
+        ERC1820_REGISTRY.setInterfaceImplementer(address(this), keccak256("ERC777Token"), address(this));
+        ERC1820_REGISTRY.setInterfaceImplementer(address(this), keccak256("ERC20Token"), address(this));
     }
 
     /**
@@ -437,7 +437,7 @@ contract ERC777 is Context, IERC777, IERC20 {
     )
         private
     {
-        address implementer = _erc1820.getInterfaceImplementer(from, TOKENS_SENDER_INTERFACE_HASH);
+        address implementer = ERC1820_REGISTRY.getInterfaceImplementer(from, TOKENS_SENDER_INTERFACE_HASH);
         if (implementer != address(0)) {
             IERC777Sender(implementer).tokensToSend(operator, from, to, amount, userData, operatorData);
         }
@@ -465,7 +465,7 @@ contract ERC777 is Context, IERC777, IERC20 {
     )
         private
     {
-        address implementer = _erc1820.getInterfaceImplementer(to, TOKENS_RECIPIENT_INTERFACE_HASH);
+        address implementer = ERC1820_REGISTRY.getInterfaceImplementer(to, TOKENS_RECIPIENT_INTERFACE_HASH);
         if (implementer != address(0)) {
             IERC777Recipient(implementer).tokensReceived(operator, from, to, amount, userData, operatorData);
         } else if (requireReceptionAck) {

package-lock.json

@@ -5,18 +5,18 @@
   "requires": true,
   "dependencies": {
     "@babel/code-frame": {
-      "version": "7.0.0",
-      "resolved": "https://registry.npmjs.org/@babel/code-frame/-/code-frame-7.0.0.tgz",
-      "integrity": "sha512-OfC2uemaknXr87bdLUkWog7nYuliM9Ij5HUcajsVcMCpQrcLmtxRbVFTIqmcSkSeYRBFBRxs2FiUqFJDLdiebA==",
+      "version": "7.5.5",
+      "resolved": "https://registry.npmjs.org/@babel/code-frame/-/code-frame-7.5.5.tgz",
+      "integrity": "sha512-27d4lZoomVyo51VegxI20xZPuSHusqbQag/ztrBC7wegWoQ1nLREPVSKSW8byhTlzTKyNE4ifaTA6lCp7JjpFw==",
       "dev": true,
       "requires": {
         "@babel/highlight": "^7.0.0"
       }
     },
     "@babel/highlight": {
-      "version": "7.0.0",
-      "resolved": "https://registry.npmjs.org/@babel/highlight/-/highlight-7.0.0.tgz",
-      "integrity": "sha512-UFMC4ZeFC48Tpvj7C8UgLvtkaUuovQX+5xNWrsIoMG8o2z+XFKjKaN9iVmS84dPwVN00W4wPmqvYoZF3EGAsfw==",
+      "version": "7.5.0",
+      "resolved": "https://registry.npmjs.org/@babel/highlight/-/highlight-7.5.0.tgz",
+      "integrity": "sha512-7dV4eu9gBxoM0dAnj/BCFDW9LFU0zvTrkq0ugM7pnHEgguOEeOz1so2ZghEdzviYzQEED0r4EAgpsBChKy1TRQ==",
       "dev": true,
       "requires": {
         "chalk": "^2.0.0",
@@ -34,22 +34,14 @@
           }
         },
         "chalk": {
-          "version": "2.4.1",
-          "resolved": "https://registry.npmjs.org/chalk/-/chalk-2.4.1.tgz",
-          "integrity": "sha512-ObN6h1v2fTJSmUXoS3nMQ92LbDK9be4TV+6G+omQlGJFdcUX5heKi1LZ1YnRMIgwTLEj3E24bT6tYni50rlCfQ==",
+          "version": "2.4.2",
+          "resolved": "https://registry.npmjs.org/chalk/-/chalk-2.4.2.tgz",
+          "integrity": "sha512-Mti+f9lpJNcwF4tWV8/OrTTtF1gZi+f8FqlyAdouralcFWFQWF2+NgCHShjkCb+IFBLq9buZwE1xckQU4peSuQ==",
           "dev": true,
           "requires": {
             "ansi-styles": "^3.2.1",
             "escape-string-regexp": "^1.0.5",
             "supports-color": "^5.3.0"
-          },
-          "dependencies": {
-            "escape-string-regexp": {
-              "version": "1.0.5",
-              "resolved": "https://registry.npmjs.org/escape-string-regexp/-/escape-string-regexp-1.0.5.tgz",
-              "integrity": "sha1-G2HAViGQqN/2rjuyzwIAyhMLhtQ=",
-              "dev": true
-            }
           }
         },
         "js-tokens": {
@@ -2229,18 +2221,6 @@
         "is-directory": "^0.3.1",
         "js-yaml": "^3.13.1",
         "parse-json": "^4.0.0"
-      },
-      "dependencies": {
-        "parse-json": {
-          "version": "4.0.0",
-          "resolved": "https://registry.npmjs.org/parse-json/-/parse-json-4.0.0.tgz",
-          "integrity": "sha1-vjX1Qlvh9/bHRxhPmKeIy5lHfuA=",
-          "dev": true,
-          "requires": {
-            "error-ex": "^1.3.1",
-            "json-parse-better-errors": "^1.0.1"
-          }
-        }
       }
     },
     "create-ecdh": {
@@ -4205,9 +4185,9 @@
       }
     },
     "flatted": {
-      "version": "2.0.0",
-      "resolved": "https://registry.npmjs.org/flatted/-/flatted-2.0.0.tgz",
-      "integrity": "sha512-R+H8IZclI8AAkSBRQJLVOsxwAoHd6WC40b4QTNWIjzAa6BXOBfQcM587MXDTVPeYaopFNWHUFLx7eNmHDSxMWg==",
+      "version": "2.0.1",
+      "resolved": "https://registry.npmjs.org/flatted/-/flatted-2.0.1.tgz",
+      "integrity": "sha512-a1hQMktqW9Nmqr5aktAux3JMNqaucxGcjtjWnZLHX7yyPCmlSV3M54nGYbqT8K+0GhF3NBgmJCc3ma+WOgX8Jg==",
       "dev": true
     },
     "follow-redirects": {
@@ -8393,9 +8373,9 @@
       "dev": true
     },
     "prettier": {
-      "version": "1.17.1",
-      "resolved": "https://registry.npmjs.org/prettier/-/prettier-1.17.1.tgz",
-      "integrity": "sha512-TzGRNvuUSmPgwivDqkZ9tM/qTGW9hqDKWOE9YHiyQdixlKbv7kvEqsmDPrcHJTKwthU774TQwZXVtaQ/mMsvjg==",
+      "version": "1.18.2",
+      "resolved": "https://registry.npmjs.org/prettier/-/prettier-1.18.2.tgz",
+      "integrity": "sha512-OeHeMc0JhFE9idD4ZdtNibzY0+TPHSpSSb9h8FqtP+YnoZZ1sl8Vc9b1sasjfymH3SonAF4QcA2+mzHPhMvIiw==",
       "dev": true,
       "optional": true
     },
@@ -9645,13 +9625,14 @@
       }
     },
     "solhint": {
-      "version": "2.1.0",
-      "resolved": "https://registry.npmjs.org/solhint/-/solhint-2.1.0.tgz",
-      "integrity": "sha512-GBxxMKJQNbSPEN4L9TguQMi0y7iiVpA5n+ZBn/QRdnXwPUMbmxAK2CkbzMccY1wd8n1GA8UahbQ0pKANwkWiZA==",
+      "version": "2.3.0",
+      "resolved": "https://registry.npmjs.org/solhint/-/solhint-2.3.0.tgz",
+      "integrity": "sha512-2yiELLp+MsDtuOTrjc14lgsYmlMchp++SicvqCBu01VXsi9Mk2uynhyN3nBfbGzYq1YfmOEBpUqJfFYXVAR/Ig==",
       "dev": true,
       "requires": {
         "ajv": "^6.6.1",
         "antlr4": "4.7.1",
+        "chalk": "^2.4.2",
         "commander": "2.18.0",
         "cosmiconfig": "^5.0.7",
         "eslint": "^5.6.0",
@@ -9661,25 +9642,25 @@
         "js-yaml": "^3.12.0",
         "lodash": "^4.17.11",
         "prettier": "^1.14.3",
-        "semver": "^6.0.0"
+        "semver": "^6.3.0"
       },
       "dependencies": {
         "acorn": {
-          "version": "6.1.1",
-          "resolved": "https://registry.npmjs.org/acorn/-/acorn-6.1.1.tgz",
-          "integrity": "sha512-jPTiwtOxaHNaAPg/dmrJ/beuzLRnXtB0kQPQ8JpotKJgTB6rX6c8mlf315941pyjBSaPg8NHXS9fhP4u17DpGA==",
+          "version": "6.3.0",
+          "resolved": "https://registry.npmjs.org/acorn/-/acorn-6.3.0.tgz",
+          "integrity": "sha512-/czfa8BwS88b9gWQVhc8eknunSA2DoJpJyTQkhheIf5E48u1N0R4q/YxxsAeqRrmK9TQ/uYfgLDfZo91UlANIA==",
           "dev": true
         },
         "acorn-jsx": {
-          "version": "5.0.1",
-          "resolved": "https://registry.npmjs.org/acorn-jsx/-/acorn-jsx-5.0.1.tgz",
-          "integrity": "sha512-HJ7CfNHrfJLlNTzIEUTj43LNWGkqpRLxm3YjAlcD0ACydk9XynzYsCBHxut+iqt+1aBXkx9UP/w/ZqMr13XIzg==",
+          "version": "5.0.2",
+          "resolved": "https://registry.npmjs.org/acorn-jsx/-/acorn-jsx-5.0.2.tgz",
+          "integrity": "sha512-tiNTrP1MP0QrChmD2DdupCr6HWSFeKVw5d/dHTu4Y7rkAkRhU/Dt7dphAfIUyxtHpl/eBVip5uTNSpQJHylpAw==",
           "dev": true
         },
         "ajv": {
-          "version": "6.10.0",
-          "resolved": "https://registry.npmjs.org/ajv/-/ajv-6.10.0.tgz",
-          "integrity": "sha512-nffhOpkymDECQyR0mnsUtoCE8RlX38G0rYP+wgLWFyZuUyuuojSSvi/+euOiQBIn63whYwYVIIH1TvE3tu4OEg==",
+          "version": "6.10.2",
+          "resolved": "https://registry.npmjs.org/ajv/-/ajv-6.10.2.tgz",
+          "integrity": "sha512-TXtUUEYHuaTEbLZWIKUr5pmBuhDLy+8KYtPYdcV8qC+pOZL+NKqYwvWSRrVXHn+ZmRRAu8vJTAznH7Oag6RVRw==",
           "dev": true,
           "requires": {
             "fast-deep-equal": "^2.0.1",
@@ -9695,9 +9676,9 @@
           "dev": true
         },
         "ansi-regex": {
-          "version": "3.0.0",
-          "resolved": "https://registry.npmjs.org/ansi-regex/-/ansi-regex-3.0.0.tgz",
-          "integrity": "sha1-7QMXwyIGT3lGbAKWa922Bas32Zg=",
+          "version": "4.1.0",
+          "resolved": "https://registry.npmjs.org/ansi-regex/-/ansi-regex-4.1.0.tgz",
+          "integrity": "sha512-1apePfXM1UOSqw0o9IiFAovVz9M5S1Dg+4TrDwfMewQ6p/rmMueb7tWZjQ1rx4Loy1ArBggoqGpfqqdI4rondg==",
           "dev": true
         },
         "ansi-styles": {
@@ -9746,9 +9727,9 @@
           },
           "dependencies": {
             "semver": {
-              "version": "5.7.0",
-              "resolved": "https://registry.npmjs.org/semver/-/semver-5.7.0.tgz",
-              "integrity": "sha512-Ya52jSX2u7QKghxeoFGpLwCtGlt7j0oY9DYb5apt9nPlJ42ID+ulTXESnt/qAQcoSERyZ5sl3LDIOw0nAn/5DA==",
+              "version": "5.7.1",
+              "resolved": "https://registry.npmjs.org/semver/-/semver-5.7.1.tgz",
+              "integrity": "sha512-sauaDf/PZdVgrLTNYHRtpXa1iRiKcaebiKQ1BJdpQlWH2lCvexQdX55snPFyK7QzpudqbCI0qXFfOasHdyNDGQ==",
               "dev": true
             }
           }
@@ -9816,9 +9797,9 @@
           },
           "dependencies": {
             "semver": {
-              "version": "5.7.0",
-              "resolved": "https://registry.npmjs.org/semver/-/semver-5.7.0.tgz",
-              "integrity": "sha512-Ya52jSX2u7QKghxeoFGpLwCtGlt7j0oY9DYb5apt9nPlJ42ID+ulTXESnt/qAQcoSERyZ5sl3LDIOw0nAn/5DA==",
+              "version": "5.7.1",
+              "resolved": "https://registry.npmjs.org/semver/-/semver-5.7.1.tgz",
+              "integrity": "sha512-sauaDf/PZdVgrLTNYHRtpXa1iRiKcaebiKQ1BJdpQlWH2lCvexQdX55snPFyK7QzpudqbCI0qXFfOasHdyNDGQ==",
               "dev": true
             }
           }
@@ -9845,9 +9826,9 @@
           }
         },
         "external-editor": {
-          "version": "3.0.3",
-          "resolved": "https://registry.npmjs.org/external-editor/-/external-editor-3.0.3.tgz",
-          "integrity": "sha512-bn71H9+qWoOQKyZDo25mOMVpSmXROAsTJVVVYzrrtol3d4y+AsKjf4Iwl2Q+IuT0kFSQ1qo166UuIwqYq7mGnA==",
+          "version": "3.1.0",
+          "resolved": "https://registry.npmjs.org/external-editor/-/external-editor-3.1.0.tgz",
+          "integrity": "sha512-hMQ4CX1p1izmuLYyZqLMO/qGNw10wSv9QDCPfzXfyFrOaCSSoRfqE1Kf1s5an66J5JZC62NewG+mK49jOCtQew==",
           "dev": true,
           "requires": {
             "chardet": "^0.7.0",
@@ -9911,9 +9892,9 @@
           "dev": true
         },
         "import-fresh": {
-          "version": "3.0.0",
-          "resolved": "https://registry.npmjs.org/import-fresh/-/import-fresh-3.0.0.tgz",
-          "integrity": "sha512-pOnA9tfM3Uwics+SaBLCNyZZZbK+4PTu0OPZtLlMIrv17EdBoC15S9Kn8ckJ9TZTyKb3ywNE5y1yeDxxGA7nTQ==",
+          "version": "3.1.0",
+          "resolved": "https://registry.npmjs.org/import-fresh/-/import-fresh-3.1.0.tgz",
+          "integrity": "sha512-PpuksHKGt8rXfWEr9m9EHIpgyyaltBy8+eF6GJM0QCAxMgxCfucMF3mjecK2QsJr0amJW7gTqh5/wht0z2UhEQ==",
           "dev": true,
           "requires": {
             "parent-module": "^1.0.0",
@@ -9921,9 +9902,9 @@
           }
         },
         "inquirer": {
-          "version": "6.3.1",
-          "resolved": "https://registry.npmjs.org/inquirer/-/inquirer-6.3.1.tgz",
-          "integrity": "sha512-MmL624rfkFt4TG9y/Jvmt8vdmOo836U7Y0Hxr2aFk3RelZEGX4Igk0KabWrcaaZaTv9uzglOqWh1Vly+FAWAXA==",
+          "version": "6.5.2",
+          "resolved": "https://registry.npmjs.org/inquirer/-/inquirer-6.5.2.tgz",
+          "integrity": "sha512-cntlB5ghuB0iuO65Ovoi8ogLHiWGs/5yNrtUcKjFhSSiVeAIVpD7koaSU9RM8mpXw5YDi9RdYXGQMaOURB7ycQ==",
           "dev": true,
           "requires": {
             "ansi-escapes": "^3.2.0",
@@ -9932,7 +9913,7 @@
             "cli-width": "^2.0.0",
             "external-editor": "^3.0.3",
             "figures": "^2.0.0",
-            "lodash": "^4.17.11",
+            "lodash": "^4.17.12",
             "mute-stream": "0.0.7",
             "run-async": "^2.2.0",
             "rxjs": "^6.4.0",
@@ -9941,12 +9922,6 @@
             "through": "^2.3.6"
           },
           "dependencies": {
-            "ansi-regex": {
-              "version": "4.1.0",
-              "resolved": "https://registry.npmjs.org/ansi-regex/-/ansi-regex-4.1.0.tgz",
-              "integrity": "sha512-1apePfXM1UOSqw0o9IiFAovVz9M5S1Dg+4TrDwfMewQ6p/rmMueb7tWZjQ1rx4Loy1ArBggoqGpfqqdI4rondg==",
-              "dev": true
-            },
             "strip-ansi": {
               "version": "5.2.0",
               "resolved": "https://registry.npmjs.org/strip-ansi/-/strip-ansi-5.2.0.tgz",
@@ -9958,12 +9933,6 @@
             }
           }
         },
-        "is-fullwidth-code-point": {
-          "version": "2.0.0",
-          "resolved": "https://registry.npmjs.org/is-fullwidth-code-point/-/is-fullwidth-code-point-2.0.0.tgz",
-          "integrity": "sha1-o7MKXE8ZkYMWeqq5O+764937ZU8=",
-          "dev": true
-        },
         "json-schema-traverse": {
           "version": "0.4.1",
           "resolved": "https://registry.npmjs.org/json-schema-traverse/-/json-schema-traverse-0.4.1.tgz",
@@ -9971,9 +9940,9 @@
           "dev": true
         },
         "ms": {
-          "version": "2.1.1",
-          "resolved": "https://registry.npmjs.org/ms/-/ms-2.1.1.tgz",
-          "integrity": "sha512-tgp+dl5cGk28utYktBsrFqA7HKgrhgPsg6Z/EfhWI4gl1Hwq8B/GmY/0oXZ6nF8hDVesS/FpnYaD/kOWhYQvyg==",
+          "version": "2.1.2",
+          "resolved": "https://registry.npmjs.org/ms/-/ms-2.1.2.tgz",
+          "integrity": "sha512-sGkPx+VjMtmA6MX27oA4FBFELFCZZ4S4XqeGOXCv68tT+jb3vk/RyaKWP0PTKyWtmLSM0b+adUTEvbs1PEaH2w==",
           "dev": true
         },
         "regexpp": {
@@ -9998,9 +9967,9 @@
           }
         },
         "semver": {
-          "version": "6.1.1",
-          "resolved": "https://registry.npmjs.org/semver/-/semver-6.1.1.tgz",
-          "integrity": "sha512-rWYq2e5iYW+fFe/oPPtYJxYgjBm8sC4rmoGdUOgBB7VnwKt6HrL793l2voH1UlsyYZpJ4g0wfjnTEO1s1NP2eQ==",
+          "version": "6.3.0",
+          "resolved": "https://registry.npmjs.org/semver/-/semver-6.3.0.tgz",
+          "integrity": "sha512-b39TBaTSfV6yBrapU89p5fKekE2m/NwnDocOVruQFS1/veMgdzuPcnOM34M6CwxW8jH/lxEa5rBoDeUwu5HHTw==",
           "dev": true
         },
         "slice-ansi": {
@@ -10014,16 +9983,6 @@
             "is-fullwidth-code-point": "^2.0.0"
           }
         },
-        "string-width": {
-          "version": "2.1.1",
-          "resolved": "https://registry.npmjs.org/string-width/-/string-width-2.1.1.tgz",
-          "integrity": "sha512-nOqH59deCq9SRHlxq1Aw85Jnt4w6KvLKqWVik6oA9ZklXLNIOlqg4F2yrT1MVaTjAqvVwdfeZ7w7aCvJD7ugkw==",
-          "dev": true,
-          "requires": {
-            "is-fullwidth-code-point": "^2.0.0",
-            "strip-ansi": "^4.0.0"
-          }
-        },
         "strip-ansi": {
           "version": "4.0.0",
           "resolved": "https://registry.npmjs.org/strip-ansi/-/strip-ansi-4.0.0.tgz",
@@ -10031,6 +9990,14 @@
           "dev": true,
           "requires": {
             "ansi-regex": "^3.0.0"
+          },
+          "dependencies": {
+            "ansi-regex": {
+              "version": "3.0.0",
+              "resolved": "https://registry.npmjs.org/ansi-regex/-/ansi-regex-3.0.0.tgz",
+              "integrity": "sha1-7QMXwyIGT3lGbAKWa922Bas32Zg=",
+              "dev": true
+            }
           }
         },
         "supports-color": {
@@ -10043,23 +10010,17 @@
           }
         },
         "table": {
-          "version": "5.4.0",
-          "resolved": "https://registry.npmjs.org/table/-/table-5.4.0.tgz",
-          "integrity": "sha512-nHFDrxmbrkU7JAFKqKbDJXfzrX2UBsWmrieXFTGxiI5e4ncg3VqsZeI4EzNmX0ncp4XNGVeoxIWJXfCIXwrsvw==",
+          "version": "5.4.6",
+          "resolved": "https://registry.npmjs.org/table/-/table-5.4.6.tgz",
+          "integrity": "sha512-wmEc8m4fjnob4gt5riFRtTu/6+4rSe12TpAELNSqHMfF3IqnA+CH37USM6/YR3qRZv7e56kAEAtd6nKZaxe0Ug==",
           "dev": true,
           "requires": {
-            "ajv": "^6.9.1",
-            "lodash": "^4.17.11",
+            "ajv": "^6.10.2",
+            "lodash": "^4.17.14",
             "slice-ansi": "^2.1.0",
             "string-width": "^3.0.0"
           },
           "dependencies": {
-            "ansi-regex": {
-              "version": "4.1.0",
-              "resolved": "https://registry.npmjs.org/ansi-regex/-/ansi-regex-4.1.0.tgz",
-              "integrity": "sha512-1apePfXM1UOSqw0o9IiFAovVz9M5S1Dg+4TrDwfMewQ6p/rmMueb7tWZjQ1rx4Loy1ArBggoqGpfqqdI4rondg==",
-              "dev": true
-            },
             "string-width": {
               "version": "3.1.0",
               "resolved": "https://registry.npmjs.org/string-width/-/string-width-3.1.0.tgz",

package.json

@@ -63,7 +63,7 @@
     "micromatch": "^4.0.2",
     "nodemon": "^1.19.3",
     "openzeppelin-test-helpers": "^0.4.3",
-    "solhint": "2.1.0",
+    "solhint": "2.3.0",
     "solidity-coverage": "github:rotcivegaf/solidity-coverage#5875f5b7bc74d447f3312c9c0e9fc7814b482477",
     "solidity-docgen": "^0.3.4",
     "truffle": "^5.0.39"