fix: polyfill Buffer for browser compatibility (#112)

* Polyfill with "buffer" and "assert" for browser environments
* Instead of relying on webpack to make this library browser compatible, we now use a buffer library that provides a polyfill when used in the browser

packages/ripple-binary-codec/test/binary-parser.test.js

@@ -11,6 +11,7 @@ const { Field, TransactionType } = require("./../dist/enums");
 const { parseHexOnly, hexOnly, loadFixture } = require("./utils");
 const fixtures = loadFixture("data-driven-tests.json");
 const { BytesList } = require("../dist/serdes/binary-serializer");
+const { Buffer } = require("buffer/");
 
 const __ = hexOnly;
 function toJSON(v) {

packages/ripple-binary-codec/test/binary-serializer.test.js

@@ -6,6 +6,7 @@ const { makeParser, BytesList, BinarySerializer } = binary;
 const { coreTypes } = require("../dist/types");
 const { UInt8, UInt16, UInt32, UInt64, STObject } = coreTypes;
 const bigInt = require("big-integer");
+const { Buffer } = require("buffer/");
 
 const { loadFixture } = require("./utils");
 const fixtures = loadFixture("data-driven-tests.json");

packages/ripple-binary-codec/test/hash.test.js

@@ -1,5 +1,6 @@
 const { coreTypes } = require("../dist/types");
 const { Hash160, Hash256, AccountID, Currency } = coreTypes;
+const { Buffer } = require("buffer/");
 
 describe("Hash160", function () {
   test("has a static width member", function () {

packages/ripple-binary-codec/test/shamap.test.js

@@ -2,6 +2,7 @@ const { ShaMap } = require("../dist/shamap.js");
 const { binary, HashPrefix } = require("../dist/coretypes");
 const { coreTypes } = require("../dist/types");
 const { loadFixture } = require("./utils");
+const { Buffer } = require("buffer/");
 
 function now() {
   return Number(Date.now()) / 1000;

packages/ripple-binary-codec/test/utils.js

@@ -1,4 +1,5 @@
 const fs = require("fs");
+const { Buffer } = require('buffer/')
 
 function hexOnly(hex) {
   return hex.replace(/[^a-fA-F0-9]/g, "");