sync lodash (#391)

* sync lodash

* update

* update

* update

* update

* update

* update

* add test case

Author: li-jia-nan

src/omit.ts

@@ -1,6 +1,6 @@
 export default function omit<T extends object, K extends keyof T>(
   obj: T,
-  fields: K[],
+  fields: K[] | readonly K[],
 ): Omit<T, K> {
   const clone = { ...obj };
 

tests/omit.test.ts

@@ -10,4 +10,9 @@ describe('omit', () => {
     const ret = omit({ bamboo: 1 }, null);
     expect(ret).toEqual({ bamboo: 1 });
   });
+
+  it('readonly array', () => {
+    const ret = omit({ keep: 1, ignore: 2 }, ['ignore'] as const);
+    expect(ret).toEqual({ keep: 1 });
+  });
 });