Add babel presets in the config file for using ES6

Author: ygpedroso

.babelrc

@@ -0,0 +1,7 @@
+{
+  "presets": ["@babel/preset-env", "@babel/preset-react"],
+  "plugins": [
+    "@babel/plugin-proposal-object-rest-spread",
+    ["@babel/plugin-proposal-class-properties", { "spec": true }]
+  ]
+}