Add platform utility support

Author: ncalteen

__fixtures__/exec.ts

@@ -0,0 +1,9 @@
+import { jest } from '@jest/globals'
+
+export const exec = jest.fn().mockImplementation(() => {})
+export const getExecOutput = jest.fn().mockImplementation(() => {})
+
+export default {
+  exec,
+  getExecOutput
+}