Refactored UInt and Derived Classes (#83)

Refactored UInt and Derived classes to be constructed from Buffers, and swapped out BN.js in favor of BigInt to reduce dependencies.

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

@@ -128,12 +128,12 @@ function transactionParsingTests () {
     {
       const [field, value] = readField()
       expect(field).toEqual(Field.Flags)
-      expect(value.val).toEqual(0)
+      expect(value.valueOf()).toEqual(0)
     }
     {
       const [field, value] = readField()
       expect(field).toEqual(Field.Sequence)
-      expect(value.val).toEqual(103929)
+      expect(value.valueOf()).toEqual(103929)
     }
     {
       const [field, value] = readField()

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

@@ -1,6 +1,5 @@
 /* eslint-disable func-style */
 
-const { BN } = require('bn.js')
 const { binary } = require('../dist/coretypes')
 const { encode } = require('../dist')
 const { makeParser, BytesList, BinarySerializer } = binary
@@ -110,7 +109,7 @@ check(UInt64, 0xFEFFFFFF, [0, 0, 0, 0, 254, 255, 255, 255])
 check(UInt64, -1, 'throws')
 check(UInt64, 0, [0, 0, 0, 0, 0, 0, 0, 0])
 check(UInt64, 1, [0, 0, 0, 0, 0, 0, 0, 1])
-check(UInt64, new BN(1), [0, 0, 0, 0, 0, 0, 0, 1])
+check(UInt64, BigInt(1), [0, 0, 0, 0, 0, 0, 0, 1])
 
 // function parseLedger4320278() {
 //   test('can parse object', done => {

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

@@ -2,7 +2,7 @@ const { coreTypes } = require('../dist/types')
 const { UInt8, UInt64 } = coreTypes
 
 test('compareToTests', () => {
-  expect(UInt8.from(124).compareTo(UInt64.from(124))).toBe(-0)
+  expect(UInt8.from(124).compareTo(UInt64.from(124))).toBe(0)
 })
 
 test('compareToTest', () => {