Version used in PyHDL-Eval MLCAD'24 paper

bump version to 3.1

Merge pull request #186 from pymtl/dev-3.0-release

official 3.0 release

bump version to 0.6, the last release before 3.0 official release

bump version

bump version to 0.5.5

bump version to 0.5.3

bump version to 0.5.2

fix graphviz import

bump version to 0.5