add utility for 'deep merge'

src/utils/deepMerge.js

@@ -0,0 +1,9 @@
+const merge = (target, source) => {
+  Object.keys(source).forEach(key => {
+    if (source[key] instanceof Object) Object.assign(source[key], merge(target[key], source[key]));
+  });
+
+  return { ...target, ...source };
+}
+
+export default merge;

src/utils/index.js

@@ -1,4 +1,5 @@
 import monaco from './monaco';
 import noop from './noop';
+import deepMerge from './deepMerge';
 
-export { noop, monaco };
+export { noop, monaco, deepMerge };