1.2.0

A few non-trivial updates:

• (H)CTL model checker has been updated to version 0.3.0 and now supports quantifiers with domain (i.e. V{x} in %domain%).
• PerturbedAsynchronousGraph cannot be created from a network with implicit parameters. This simplifies a lot of correctness reasoning, because the color sets of the internal graphs and the original network are always compatible.
• CI is now testing that example notebooks work.
• Several methods where it makes sense (mostly various mk_* methods) can take a Model object instead of raw values (e.g. VertexModel instead of dict[VariableId, bool]).

Other misc stuff:

• Added Bdd.validate implemented in lib-bdd version 0.5.22.
• Added VertexSet.enclosed_subspace and VertexSet.enclosed_named_subspace.