Merge pull request #388 from panjf2000/dev

minor: v2.12.0

Merge pull request #385 from panjf2000/dev

patch: v2.11.6

Merge pull request #379 from panjf2000/dev

patch: v2.11.5

Fix the miscalculated result returned by pool.Free

docs: update the comment on Options.PanicHandler to match its behavior (

#365) (#366)

Fixes #364

Merge pull request #361 from panjf2000/dev

patch: v2.11.2

Merge pull request #357 from panjf2000/dev

patch: 2.11.1

Merge pull request #352 from panjf2000/dev

minor: v2.11.0

minor: v2.10.0 (update) (#335)

minor: v2.10.0 (update)

Merge pull request #318 from panjf2000/dev

patch: v2.9.1