ts: Types fixes (#850)

ts/src/program/event.ts

@@ -1,6 +1,6 @@
 import { PublicKey } from "@solana/web3.js";
 import * as assert from "assert";
-import { IdlEvent, IdlEventField } from "src/idl";
+import { IdlEvent, IdlEventField } from "../idl";
 import Coder from "../coder";
 import { DecodeType } from "./namespace/types";
 import Provider from "../provider";

ts/src/program/namespace/types.ts

@@ -1,6 +1,6 @@
 import { PublicKey } from "@solana/web3.js";
 import BN from "bn.js";
-import { Idl } from "src";
+import { Idl } from "../../";
 import {
   IdlField,
   IdlInstruction,

ts/types/buffer-layout/index.d.ts

@@ -7,7 +7,7 @@ declare module 'buffer-layout' {
 
     constructor(span: number, property?: string);
 
-    decode(b: Buffer, offset?: number): T;
+    decode(b: Buffer | string, offset?: number): T;
     encode(src: T, b: Buffer, offset?: number): number;
     getSpan(b: Buffer, offset?: number): number;
     replicate(name: string): this;