test: revise pytest environment
- Review
Pipfile:
- Remove unused
filelock; - Install
mypy- static type checker for Python.
- Add new command
pipenv run lint. - Enable
mypyin CI. Fix reported errors intest_basics.py. - Renew readme.
Pipfile:filelock;mypy - static type checker for Python.pipenv run lint.mypy in CI. Fix reported errors in test_basics.py.