Add more tests

[OrkoHunter]

• Whenever a new change is introduced, deploy the branch as a separate heroku app.
• The following flows must be tested
  • PR_FLOW
    • Create a new PR involving Python files with errors without .pep8speaks.yml - Test errors without .pep8speaks.yml test-pep8speaks#81
    • Create a new PR involving Python files with errors with .pep8speaks.yml - Test errors with pep8speaks.yml test-pep8speaks#82
    • Create a new PR which uses setup.cfg to read configurations. - Test errors with setup.cfg and pep8speaks.yml test-pep8speaks#83
    • Create a new PR involving Python files without errors without .pep8speaks.yml
    • Create a new PR involving Python files without errors with .pep8speaks.yml
    • Add a new commit to an opened PR with fixing the issues with .pep8speaks.yml
    • Add a new commit to an opened PR with fixing the issues without .pep8speaks.yml
    • Add a new commit to an opened PR with maintaining the issues with .pep8speaks.yml
    • Add a new commit to an opened PR with maintaining the issues without .pep8speaks.yml
    • Add a new commit to an opened PR with creating new issues with .pep8speaks.yml
    • Add a new commit to an opened PR with creating new issues without .pep8speaks.yml
  • Diff flow
    • Ask for diff on a PR with errors with .pep8speaks.yml
    • Ask for diff on a PR with errors without .pep8speaks.yml
    • Ask for diff on a PR without errors with .pep8speaks.yml
    • Ask for diff on a PR without errors without .pep8speaks.yml
  • pep8ify flow
    • Ask for pep8 fix on a PR with errors with .pep8speaks.yml
    • Ask for pep8 fix on a PR with errors without .pep8speaks.yml
    • Ask for pep8 fix on a PR without errors with .pep8speaks.yml
    • Ask for pep8 fix on a PR without errors without .pep8speaks.yml