Add type annotations

[MartinThoma]

See issue #197

[coveralls]

Coverage increased (+0.09%) to 79.114% when pulling 4312913 on MartinThoma:issue-197-initial into 0ee6b4a on sh4nks:master.

[sh4nks]

Sorry for getting back to your PR so late. Looks good, however there appears to a conflict with current master. Could you rebase you PR against the latest master?

[MartinThoma]

@sh4nks No problem; I've rebased and pushed again :-)

[MartinThoma]

I've also added the Typing :: Typed trove classifier

[sh4nks]

Thanks!

[hnicholson-Ocient]

@MartinThoma do these changes work for mypy? I have started using mypy in my project which is using v1.10.1 of this package, which includes these changes. mypy complains with

cache.py:3: error: Skipping analyzing 'flask_caching': found module but no type hints or library stubs

Based on the mypy docs, packages need to both have types, and declare themselves to be pep 561 compliant (or registered themselves on typeshed ).

I can create an issue for this, I just wanted to check if you had this working in mypy for you.