Fix compilation resetting for all new updates

Fixes codesandbox#995

Author: CompuIves

packages/app/src/sandbox/eval/manager.js

@@ -1,5 +1,5 @@
 // @flow
-import { flattenDeep, uniq, values, isEqual } from 'lodash-es';
+import { flattenDeep, uniq, values } from 'lodash-es';
 import resolve from 'browser-resolve';
 import localforage from 'localforage';
 
@@ -661,7 +661,7 @@ export default class Manager {
 
   updateConfigurations(configurations: Configurations) {
     const configsUpdated = this.configurations
-      ? !isEqual(configurations, this.configurations)
+      ? JSON.stringify(configurations) !== JSON.stringify(this.configurations)
       : false;
 
     if (configsUpdated) {

packages/app/src/sandbox/eval/transpilers/babel/babel-parser.js

@@ -51,7 +51,10 @@ export default function getBabelConfig(
     if (
       finalConfig.plugins.indexOf('transform-es2015-modules-commonjs') === -1
     ) {
-      finalConfig.plugins.push('transform-es2015-modules-commonjs');
+      finalConfig.plugins = [
+        ...finalConfig.plugins,
+        'transform-es2015-modules-commonjs',
+      ];
     }
   } else {
     finalConfig.plugins = ['transform-es2015-modules-commonjs'];