Remove assert statement from non-test files (#7)

* Remove assert statement from non-test files
* add test

Co-authored-by: deepsource-autofix[bot] <62050782+deepsource-autofix[bot]@users.noreply.github.com>
Co-authored-by: Jirka Borovec <Borda@users.noreply.github.com>
Co-authored-by: Jirka <jirka.borovec@seznam.cz>
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v0.3.1 & add pre-commit badge

license MIT

show deprecation chaining

update docs - cases

msg for no target

test miss arg

v0.1.0rc