Initial change from Babel/JS to TypeScript (#70)

* will compile as typescript

* migrated test suite to use JestJS

* Migrated to Jest testing framework and typescript source files

* updated deps

* updated prepublish

* resolved 1 failing test

* changed decimal .0 on four tests, it appears that these were the only four tests expecting integer values to have '.0'

* added linter

* added package-lock

* removed tslint in favor of eslint

* changed yarn to npm

* updated version 2.6->3.0

* removing package lock

* updated node version in nvmrc and jest version in package

* removed nvmrc

* removed some unused functions

* replaced data driven with file from master

* commitint yarn.lock

* removing babel as a dependency in favor of typescript compiling to es5

* removing babel deps

* resolved testing issues by migrating helper function

* added partial linting functionality for test suite

* updated imports for decodeLedgerData

* updated test

* updated yarn.lock

* removed a console.log

* added eslint-jest-plugin to package

* reverting to old linting, will add linting in next PR

* removed comments in shamap

* re-adding .nvmrc

* npm -> yarn

* added . to .eslintrc

* added .eslintrc

* removing linting for this PR

* Changed linting to print a message so that linting doesnt fail in CI

* changing back

* added newline so diff wont show

* removed eslint deps, since linting will be dealt with in a later PR

* changed function calls to describe(...)

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

@@ -0,0 +1,21 @@
+const { loadFixture } = require('./utils')
+const { transactionTreeHash, ledgerHash, accountStateHash } = require('../dist/ledger-hashes')
+
+describe('Ledger Hashes', function () {
+  function testFactory (ledgerFixture) {
+    describe(`can calculate hashes for ${ledgerFixture}`, function () {
+      const ledger = loadFixture(ledgerFixture)
+      test('computes correct account state hash', function () {
+        expect(accountStateHash(ledger.accountState).toHex()).toBe(ledger.account_hash)
+      })
+      test('computes correct transaction tree hash', function () {
+        expect(transactionTreeHash(ledger.transactions).toHex()).toBe(ledger.transaction_hash)
+      })
+      test('computes correct ledger header hash', function () {
+        expect(ledgerHash(ledger).toHex()).toBe(ledger.hash)
+      })
+    })
+  }
+  testFactory('ledger-full-40000.json')
+  testFactory('ledger-full-38129.json')
+})