Update babelify-config.js formatting

dist/babelify-config.js

@@ -1,12 +1,12 @@
 const babelifyConfig = {
     presets: [
         ['@babel/preset-env', {
-            'useBuiltIns': 'entry',
-            'targets': {
-                'firefox': 60,
-                'chrome': 65,
-                'opera': 52,
-                'safari': 11,
+            useBuiltIns: 'entry',
+            targets: {
+                firefox: 60,
+                chrome: 65,
+                opera: 52,
+                safari: 11,
             },
         }],
     ],