Also include stage-3 as supported language features and fix Babel con…

…figurations 👩‍🌾

.babelrc

@@ -1,3 +1,10 @@
 {
-  "presets": ["sagui"]
+  "presets": [
+    "stage-3",
+    ["env", {
+      "targets": {
+        "node": 4
+      }
+    }]
+  ]
 }

package.json

@@ -55,6 +55,7 @@
     "babel-plugin-react-transform": "^2.0.2",
     "babel-preset-env": "^1.3.3",
     "babel-preset-react": "^6.24.1",
+    "babel-preset-stage-3": "^6.24.1",
     "chalk": "^1.1.3",
     "clean-webpack-plugin": "^0.1.16",
     "commander": "^2.9.0",

src/configure-webpack/loaders/javascript.js

@@ -21,11 +21,16 @@ export default {
             path: 'babel-loader',
             query: {
               babelrc: false,
-              // Replaces require("babel-polyfill")
-              // with only the polyfills you need
-              // for the target browsers
-              useBuiltIns: true,
-              presets: [require.resolve('babel-preset-env'), require.resolve('babel-preset-react')],
+              presets: [
+                [require.resolve('babel-preset-env'), {
+                  // Replaces require("babel-polyfill")
+                  // with only the polyfills you need
+                  // for the target browsers
+                  useBuiltIns: true
+                }],
+                require.resolve('babel-preset-react'),
+                require.resolve('babel-preset-stage-3')
+              ],
               plugins: babelPlugins(action, coverage)
             }
           }]