Compile down to support IE11 and some mobile browsers (#16)

Author: DrewML

.babelrc

@@ -1,12 +1,23 @@
 {
+  "plugins": [
+    "transform-object-rest-spread",
+    "transform-class-properties",
+    ["transform-react-jsx", { "pragma": "createElement" }],
+    ["transform-runtime", {
+      "helpers": true,
+      "polyfill": false, // polyfills will be handled by preset-env
+      "regenerator": false
+    }]
+  ],
+  "presets": [
+    ["env", {
+      "targets": {
+        "browsers": ["last 2 versions", "ie 11"]
+      },
+      "modules": false
+    }]
+  ],
   "env": {
-    "development": {
-      "plugins": [
-        "transform-object-rest-spread",
-        "transform-class-properties",
-        ["transform-react-jsx", { "pragma": "createElement" }]
-      ]
-    },
     "test": {
       "plugins": [
         "transform-es2015-modules-commonjs",