[BUG] Port runner tests to Windows

[prasadtalasila]

Describe the bug

The runner tests are failing on Windows OS when tested on github actions

To Reproduce

Steps to reproduce the behavior:

1. Go to './github/workflows/runner.yml'
2. Replace line-18 (runs-on: ubuntu-latest) with lines-18 to 21 of lib-ms.yml

   strategy:
     matrix:
       os: [windows-latest, ubuntu-latest]
   runs-on: ${{ matrix.os }}

3. Check the Github actions of runner
4. See error for windows-latest

FAIL test/unit/util.spec.ts
  Check utils library
    × Should correctly resolve absolute path (6 ms)

  ● Check utils library › Should correctly resolve absolute path

    expect(received).toEqual(expected) // deep equality

    Expected: "C:Usersdtaas"
    Received: "C:\\Usersdtaas"

       8 |       // prettier-ignore
       9 |       // eslint-disable-next-line no-useless-escape
    > 10 |       expect(resolveFile('C:\Users\dtaas')).toEqual('C:\Users\dtaas');
         |                                             ^
      11 |     } else {
      12 |       expect(resolveFile('/opt/dtaas')).toEqual('/opt/dtaas');
      13 |     }

      at Object.<anonymous> (test/unit/util.spec.ts:10:45)

Expected behavior

Github action is successful for windows as well.