4.2.0

• Add -m/--minimal flag to only compile what is necessary for selected tests.
• Fix axi_stream VC for 0-length tid/tdest/tuser.
• Fix work reference for non-lower case library names. (#556)
• Add init_files.before_run hook to RivieraPRO and ModelSim.
• Do not add extra quotes when invoking a gtkwave subprocess. (#563)