Add some GitHub helpers func

[chemelli74]

• dependabot.yml: auto create PR for new version of each tools
• pre-commit
  • pyupgrade
  • black
  • codespell
  • flake8
  • bandit
  • isort
  • yamllint
  • mypy
• Don't commit to branch

[chemelli74]

If you are not considering this proposal, please go ahead and close the PR.

Thank you,

Simone

[chemelli74]

No interest on implementing, closing