Fix FanGraphs Data Issues & Various Test Fixes

Update the cache type so that it actually populates the downstream func in VS Code
Update the Fangraphs enums to support the new and renamed columns
Add tests for Fangraphs enums to compare them against the ones listed on Fangraphs' site
Fix a few minor pylint nits
Due to the change of Fielding enums, adding the pull of fielding_stats like we do batting_stats and pitching_stats
Fix statcast_pitcher_active_spin (assuming due to the fact that Statcast changed the endpoint)
Fixed attrs not being a true requirement in setup.py
Fix the Fangraphs data tests to not have hard coded column counts
Fix some season tests that fail with current season when season hasn't started yet

Fixes #194 and possibly #193

jldbc / pybaseball