Make hypothesis dependency optional (#1215)

[leifwar]

Closes #1215

[cosmicBboy]

Hi @leifwar , so the fix for this would be to make the mock SearchStrategy a generic type:

    T = typing.TypeVar("T)

    class SearchStrategy(typing.Generic[T]):  # type: ignore
        """placeholder type."""

[codecov]

Codecov Report

Patch and project coverage have no change.

Comparison is base (5792fb2) 97.23% compared to head (15a2730) 97.23%.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #1216   +/-   ##
=======================================
  Coverage   97.23%   97.23%           
=======================================
  Files          65       65           
  Lines        5066     5066           
=======================================
  Hits         4926     4926           
  Misses        140      140           

Impacted Files	Coverage Δ
pandera/strategies/pandas_strategies.py	97.82% <ø> (ø)

☔ View full report in Codecov by Sentry.
📢 Do you have feedback about the report comment? Let us know in this issue.

[cosmicBboy]

thanks, and congrats on your first PR to pandera @leifwar 🚀