add transformer aliases

src/babel/transformation/index.js

@@ -25,7 +25,10 @@ transform._ensureTransformerNames = function (type, rawKeys) {
     var key = rawKeys[i];
 
     var deprecatedKey = transform.deprecatedTransformerMap[key];
-    if (deprecatedKey) {
+    var aliasKey = transform.aliasTransformerMap[key];
+    if (aliasKey) {
+      keys.push(aliasKey);
+    } else if (deprecatedKey) {
       // deprecated key, remap it to the new one
       console.error("The transformer " + key + " has been renamed to " + deprecatedKey);
       rawKeys.push(deprecatedKey);
@@ -49,6 +52,7 @@ transform.transformers          = object();
 transform.namespaces            = object();
 
 transform.deprecatedTransformerMap = require("./transformers/deprecated");
+transform.aliasTransformerMap = require("./transformers/aliases");
 transform.moduleFormatters = require("./modules");
 
 import rawTransformers from "./transformers";

src/babel/transformation/transformers/aliases.json

@@ -0,0 +1,3 @@
+{
+  "useStrict": "strict"
+}

src/babel/transformation/transformers/deprecated.json

@@ -1,5 +1,4 @@
 {
-  "useStrict": "strict",
   "selfContained": "runtime",
   "unicode-regex": "regex.unicode",