New InputOption: "preventFailureOnNoResponse"

Closes #12

Prevent failure if no response is provided by the request

Usage:

jobs:
  request:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v2
        with:
          ref: ${{ github.ref }}

      - name: Request Postment Echo GET
        uses: ./
        with:
          url: 'https://postman-echo.com/get'
          method: 'GET'
          preventFailureOnNoResponse: 'true'