Update .eslintrc with other react class properties

In `eslint-plugin-react`'s page on their sorting rules they show the order I showed here. https://github.com/yannickcr/eslint-plugin-react/blob/master/docs/rules/sort-comp.md#rule-options

I noticed because according to the current rules `contextTypes` goes below `render` and I also noticed other methods were missing from the list. Since we're being specific we should also include the other methods and properties that `eslint-plugin-react` handles by default.

Author: chrisportela

linters/.eslintrc

@@ -190,18 +190,23 @@
     "react/wrap-multilines": 2,
     "react/sort-comp": [2, {
       "order": [
-        "displayName",
-        "mixins",
-        "statics",
-        "propTypes",
-        "getDefaultProps",
-        "getInitialState",
-        "componentWillMount",
-        "componentDidMount",
-        "componentWillReceiveProps",
-        "shouldComponentUpdate",
-        "componentWillUpdate",
-        "componentWillUnmount",
+        'displayName',
+        'propTypes',
+        'contextTypes',
+        'childContextTypes',
+        'mixins',
+        'statics',
+        'defaultProps',
+        'getDefaultProps',
+        'getInitialState',
+        'getChildContext',
+        'componentWillMount',
+        'componentDidMount',
+        'componentWillReceiveProps',
+        'shouldComponentUpdate',
+        'componentWillUpdate',
+        'componentDidUpdate',
+        'componentWillUnmount',
         "/^on.+$/",
         "/^get.+$/",
         "/^render.+$/",