chore: migrate jest-mock to TypeScript

Author: thymikee

packages/jest-mock/src/__tests__/jest_mock.test.js renamed to packages/jest-mock/src/__tests__/index.test.ts

@@ -8,7 +8,7 @@
 
 'use strict';
 
-const vm = require('vm');
+import vm from 'vm';
 
 describe('moduleMocker', () => {
   let moduleMocker;
@@ -182,6 +182,7 @@ describe('moduleMocker', () => {
     it('mocks ES2015 non-enumerable static properties and methods', () => {
       class ClassFoo {
         static foo() {}
+        static fooProp: Function;
       }
       ClassFoo.fooProp = () => {};