python-chess v0.12.4 Bugfixes: * Another en passant related Bugfix for pure Python Gaviota tablebase probing. New features: * Added `pgn.GameNode.is_end()`. Changes: * Big speedup for `pgn` module. Boards are cached less agressively. Board move stacks are copied faster. * Added tox.ini to specify test suite and flake8 options.