Support for python 3.8 features

Version 0.1.8; various bugfixes

Version 0.1.7; PEP 448 and fstring parsing bugfix

Version 0.1.6; python3 kwonlyargs bugfix

Version 0.1.5; python3.6 fstrings

Another bugfix for parsing slices, 0.1.4

Better support for parsing slices, 0.1.3

Bugfixes for parsing slices, 0.1.2

Bugfixes, 0.1.1

First release, 0.1