Revert "Delete .babelrc because it doesn't do anything"

This reverts commit 1be573bd20.

.babelrc

@@ -0,0 +1,12 @@
+{
+    "plugins": [
+        "@babel/plugin-syntax-dynamic-import",
+        "@babel/plugin-proposal-object-rest-spread",
+        ["react-intl", {
+            "messagesDir": "./translations/messages/"
+        }]],
+    "presets": [
+        ["@babel/preset-env"],
+        "@babel/preset-react"
+    ]
+}