Project refresh

[Secrus]

Pull Request Check List

• Added tests for changed code. -> No new code was added
• Updated documentation for changed code. -> Code was updated, not changed

Changes

• Added flake8 plugins and applied changes required by those

  • rewrite of Yoda comparisons
  • simplification of comprehensions and conditionals
  • rewrite of string formatting to f-strings
  • change imports from relative to absolute

• added from __future__ import annotations on most files

• migrated code to Python 3.7 syntax (pyupgrade)

• improved existing type annotations

• added mypy type checker and exclusion list (for incremental adoption of typing)

• updated dependencies

• small cleanup of linter configs

[sdispater]

Thanks a lot!