Poetry installation failing in GH Actions

[hrshdhgd]

• Update the following block in main.yml

  - name: Install Poetry
      uses: snok/install-poetry@v1
      with:
        version: 1.3.2
        virtualenvs-create: true
        virtualenvs-in-project: true

• This block is redundant to the coverage code-block beneath, hence removed

    #----------------------------------------------
    #              run test suite   
    #----------------------------------------------
    - name: Run tests
      run: poetry run pytest