chore: fix CI which has been broken since v2 release

Author: myyk

__tests__/main.test.ts

@@ -1,7 +1,13 @@
+import * as core from '@actions/core'
 import * as github from '@actions/github'
 import {GitHub} from '@actions/github/lib/utils'
 import {run} from '../src/main'
 
+// Inputs for mock @actions/core
+let inputs = {
+  'configPath': './.github/workflows'
+} as any
+
 test('test runs', () => {
   // make sure to run with `INPUT_TOKEN=your-token yarn run test`
   // Example on mocking patterns: https://github.com/actions/checkout/blob/master/__test__/input-helper.test.ts
@@ -11,6 +17,11 @@ test('test runs', () => {
     auth: process.env['INPUT_TOKEN'] as string
   })
 
+  // Mock getInput
+  jest.spyOn(core, 'getInput').mockImplementation((name: string) => {
+    return inputs[name]
+  })
+
   // Mock github context
   jest.spyOn(github.context, 'issue', 'get').mockImplementation(() => {
     return {