use Object.assign

Author: afc163

src/index.js

@@ -1,7 +1,6 @@
 function omit(obj, fields) {
-  const shallowCopy = {
-    ...obj,
-  };
+  // eslint-disable-next-line prefer-object-spread
+  const shallowCopy = Object.assign({}, obj);
   for (let i = 0; i < fields.length; i += 1) {
     const key = fields[i];
     delete shallowCopy[key];