Remove deprecated features at React v15.5 (#1905)

* Remove deprecated features at React v15.5

- [x] React.PropTypes
- [x] react-addons-pure-render-mixin
- [x] react-addons-test-utils

* Uncommented out & Add browserify_rails options

* re-add react-addons-shallow

* Fix syntax error from resolve conflicts

* follow up 59a77923b3

app/assets/javascripts/components/components/account.jsx

@@ -1,5 +1,5 @@
-import PureRenderMixin from 'react-addons-pure-render-mixin';
 import ImmutablePropTypes from 'react-immutable-proptypes';
+import PropTypes from 'prop-types';
 import Avatar from './avatar';
 import DisplayName from './display_name';
 import Permalink from './permalink';
@@ -19,30 +19,26 @@ const buttonsStyle = {
   height: '18px'
 };
 
-const Account = React.createClass({
+class Account extends React.PureComponent {
 
-  propTypes: {
-    account: ImmutablePropTypes.map.isRequired,
-    me: React.PropTypes.number.isRequired,
-    onFollow: React.PropTypes.func.isRequired,
-    onBlock: React.PropTypes.func.isRequired,
-    onMute: React.PropTypes.func.isRequired,
-    intl: React.PropTypes.object.isRequired
-  },
-
-  mixins: [PureRenderMixin],
+  constructor (props, context) {
+    super(props, context);
+    this.handleFollow = this.handleFollow.bind(this);
+    this.handleBlock = this.handleBlock.bind(this);
+    this.handleMute = this.handleMute.bind(this);
+  }
 
   handleFollow () {
     this.props.onFollow(this.props.account);
-  },
+  }
 
   handleBlock () {
     this.props.onBlock(this.props.account);
-  },
+  }
 
   handleMute () {
     this.props.onMute(this.props.account);
-  },
+  }
 
   render () {
     const { account, me, intl } = this.props;
@@ -86,6 +82,15 @@ const Account = React.createClass({
     );
   }
 
-});
+}
+
+Account.propTypes = {
+  account: ImmutablePropTypes.map.isRequired,
+  me: PropTypes.number.isRequired,
+  onFollow: PropTypes.func.isRequired,
+  onBlock: PropTypes.func.isRequired,
+  onMute: PropTypes.func.isRequired,
+  intl: PropTypes.object.isRequired
+}
 
 export default injectIntl(Account);