Log Message:
py-pandocfilters: updated to 1.5.0

v1.5.0: Last release supporting Python 2.
- Added an environment variable `PANDOCFILTER_CLEANUP` that when \ 
`get_filename4code` is used, temporary directory will be cleaned up \ 
automatically.
- `examples/` is no longer included in the distribution (i.e. source \ 
distribution or binary wheels found on PyPI.) This should be a backward \ 
incompatible change as `examples/` is never exposed as a Python module, nor \ 
entry points.
- Added a couple of examples.