6.0.0

I'm extremely stupid and didn't commit as I go. To anyone reading this
I'm extremely sorry. A lot of these changes are very broad and I plan on
releasing Babel 6.0.0 today live on stage at Ember Camp London so I'm
afraid I couldn't wait. If you're ever in London I'll buy you a beer
(or assorted beverage!) to make up for it, also I'll kiss your feet and
give you a back massage, maybe.

packages/babel-plugin-transform-member-expression-literals/src/index.js

@@ -2,8 +2,8 @@ export default function ({ types: t }) {
   return {
     visitor: {
       MemberExpression: {
-        exit(node) {
-          var prop = node.property;
+        exit({ node }) {
+          let prop = node.property;
           if (node.computed && t.isLiteral(prop) && t.isValidIdentifier(prop.value)) {
             // foo["bar"] => foo.bar
             node.property = t.identifier(prop.value);