poly check: library discovery when the name differs from the import. #237
Description
Describe the bug
The pyjwt library is highlighted as missing when using the --strict flag with the poly check command.
This is because the Library name differs in three places:
the import jwt
the pypi package name pyjwt
and the installed library name PyJWT.
The bug in The Polylith source code: it doesn't handle casings when doing the library-name/package lookups by key (lowercase/upper-lower-case)
Expected behavior
The pyjwt library should be recognized as added to the venv.
Additional context
Discussion: #209