This extension should behave as much as possible like the original
hdlmake, therefore the `write_cfgmem` command was removed from the
bitstream target.

Forgot to increment version number with previous commit....

Fixed a bug in (src/hdlmake_nonproj/tools/vivado.py).
PAR target was loading `PROJECT_post_synth` but checkpoint is named `PROJECT_synth`.

reworked gitlab ci to make use of gitlab's PyPi package registry.

removed deprecated `setup.py`
add gitlab ci