[issue27511] Add PathLike objects support to BZ2File

[Xiang Zhang]

Changes by Xiang Zhang <angwerzx at 126.com>:


----------
components: +Library (Lib)
type:  -> enhancement
versions: +Python 3.6

_______________________________________
Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue27511>
_______________________________________