Use lodash utils instead of including them in the package

package.json

@@ -26,7 +26,13 @@
     "combokeys": "^3.0.0",
     "events": "^1.0.2",
     "invariant": "^2.1.0",
-    "just-reduce-object": "^1.0.3",
+    "lodash.compact": "^3.0.1",
+    "lodash.findkey": "^4.6.0",
+    "lodash.flatten": "^4.4.0",
+    "lodash.isarray": "^4.0.0",
+    "lodash.isplainobject": "^4.0.6",
+    "lodash.map": "^4.6.0",
+    "lodash.reduce": "^4.6.0",
     "platform": "^1.3.0",
     "prop-types": "^15.5.8"
   },

src/shortcut-manager.js

@@ -1,9 +1,15 @@
-import reduce from 'just-reduce-object'
+import reduce from 'lodash.reduce'
 import invariant from 'invariant'
+import isPlainObject from 'lodash.isplainobject'
+import findKey from 'lodash.findkey'
+import isArray from 'lodash.isarray'
+import map from 'lodash.map'
+import compact from 'lodash.compact'
+import flatten from 'lodash.flatten'
+
 import { EventEmitter } from 'events'
-import helpers from './helpers'
-import { isPlainObject, findKey, isArray, map, compact, flatten } from './utils'
 
+import helpers from './helpers'
 
 const warning = (text) => {
   if (process && process.env.NODE_ENV !== 'production') {
@@ -58,7 +64,7 @@ class ShortcutManager extends EventEmitter {
 
   getAllShortcutsForPlatform(platformName) {
     const _transformShortcuts = (shortcuts) => {
-      return reduce(shortcuts, (result, keyName, keyValue) => {
+      return reduce(shortcuts, (result, keyValue, keyName) => {
         if (isPlainObject(keyValue)) {
           if (keyValue[platformName]) {
             keyValue = keyValue[platformName]