title: Pylint fail under does not fail my Github action job
body: <p>I am trying to implement a python linter using pylint. But i am getting the score of each python file and also displaying the suggestion to improve the score but I am also looking to terminate the GitHub action job if my pylint score is below 6.0 but currently its not failing my job.</p>
  <p>This is the workflow which I have used :</p>
  <pre><code>name: Python Linting
  on:
    push:
      branches:
        - 'test'
  
  jobs:
    linting:
      runs-on: ubuntu-latest
      steps:
        - name: Checkout the code
          uses: actions/checkout@v2
        - name: Install dependencies
          run: |
           python -m pip install --upgrade pip
              pip install pylint
              pip install umsgpack
              pip install cryptography
              pip install pylint-fail-under
        - name: Analysing the code with pylint
          run: find . -name '*.py' -print -exec pylint-fail-under --fail-under=7.0 --enable=W {} \;
  </code></pre>
  <p>My goal is the show that pylint has failed for a file and then terminate Git-hub action job. But i am not able to implement it using this can someone help ?</p>