ts: Add package.json metadata (#911)

ts/package.json

@@ -6,6 +6,14 @@
   "module": "dist/esm/index.js",
   "license": "(MIT OR Apache-2.0)",
   "types": "dist/cjs/index.d.ts",
+  "homepage": "https://github.com/project-serum/anchor#readme",
+  "bugs": {
+    "url": "https://github.com/project-serum/anchor/issues"
+  },
+  "repository": {
+    "type": "git",
+    "url": "https://github.com/project-serum/anchor.git"
+  },
   "publishConfig": {
     "access": "public"
   },