chore(prop-types): update propTypes to use new package

package.json

@@ -19,7 +19,8 @@
   "license": "MIT",
   "dependencies": {
     "hoist-non-react-statics": "^1.2.0",
-    "object-assign": "^4.1.0"
+    "object-assign": "^4.1.0",
+    "prop-types": "^15.5.10"
   },
   "devDependencies": {
     "babel": "^6.5.2",

src/propTypes.js

@@ -1,4 +1,4 @@
-import { PropTypes } from 'react'
+import PropTypes from 'prop-types'
 
 export default {
   model: PropTypes.object.isRequired,

src/reformed.js

@@ -1,12 +1,13 @@
 import React from 'react'
+import PropTypes from 'prop-types'
 import assign from 'object-assign'
 import hoistNonReactStatics from 'hoist-non-react-statics'
 import getComponentName from './_internal/getComponentName'
 
 const makeWrapper = (middleware) => (WrappedComponent) => {
   class FormWrapper extends React.Component {
     static propTypes = {
-      initialModel: React.PropTypes.object,
+      initialModel: PropTypes.object,
     }
 
     constructor (props, ctx) {