Update enum definitions and dependencies

* Remove redundant `bytes` from field definitions
* Remove "date-generated" given hand editing
* Remove ripple-lib test dependency
* Fix linting errors introduced by updated eslint/eslintrc
* Ensure STObject.toJSON returns a plain object

.babelrc

@@ -0,0 +1,4 @@
+{
+    "presets" : ["es2015"],
+    "retainLines": true
+}

package.json

@@ -12,27 +12,28 @@
     "test": "test"
   },
   "dependencies": {
-    "babel-runtime": "^5.8.25",
-    "bn.js": "^3.2.0",
+    "babel-runtime": "^6.6.1",
+    "bn.js": "^4.11.3",
     "create-hash": "^1.1.2",
-    "decimal.js": "^4.0.2",
+    "decimal.js": "^5.0.8",
     "inherits": "^2.0.1",
-    "lodash": "^3.10.1",
+    "lodash": "^4.12.0",
     "ripple-address-codec": "^2.0.1"
   },
   "devDependencies": {
     "assert-diff": "^1.0.1",
-    "babel": "^5.8.20",
-    "babel-core": "^5.8.20",
-    "babel-eslint": "^4.0.5",
-    "babel-loader": "^5.3.2",
+    "babel-cli": "^6.8.0",
+    "babel-core": "^6.8.0",
+    "babel-eslint": "^6.0.4",
+    "babel-loader": "^6.2.4",
+    "babel-preset-es2015": "^6.6.0",
+    "babel-register": "^6.8.0",
     "codecov.io": "^0.1.6",
-    "eslint": "^1.10.3",
-    "fs-extra": "^0.24.0",
+    "eslint": "^2.9.0",
+    "fs-extra": "^0.30.0",
     "intercept-stdout": "^0.1.2",
-    "istanbul": "~0.3.5",
-    "mocha": "~2.1.0",
-    "ripple-lib": "^0.12.9"
+    "istanbul": "~0.4.3",
+    "mocha": "~2.4.5"
   },
   "scripts": {
     "compile": "babel --optional runtime -d distrib/npm/ src/ && cp src/enums/definitions.json distrib/npm/enums",

src/binary.js

@@ -1,7 +1,5 @@
 /* eslint-disable func-style */
 
-'use strict';
-
 const types = require('./types');
 const {HashPrefix} = require('./hash-prefixes');
 const {BinaryParser} = require('./serdes/binary-parser');

src/coretypes.js

@@ -1,5 +1,3 @@
-'use strict';
-
 const _ = require('lodash');
 const enums = require('./enums');
 const {Field} = enums;