- add release.sh script to automate most of the process
- minor revisions to the unreleased changelog
- migrate away from deprecated release asset action

I'm opting for iverilog's interpretation of the specifications here. The
commercial simulators I tested seem to agree.

Co-authored-by: qcorradi <q.corradi22@imperial.ac.uk>
Co-authored-by: Zachary Snow <zach@zachjs.com>

* Remove unneeded begin/end when the loop is a do/while
* Dangling else check passes through statement attributes (bug fix)
* Dangling else check passes through most control flow structures to reduce unneeded begin/end
* Add test case and update changelog

---------

Co-authored-by: qcorradi <q.corradi22@imperial.ac.uk>
Co-authored-by: Zachary Snow <zach@zachjs.com>

* Fixing a bug where always_* are not converted when attributed
* Added tests and updated Changelog for the attributed always_* fix

- swap 1364-2001 and 1364-2001-noconfig
- fix existing begin_keywords test
- add keyword test suite for all keywords

These are now kept while still supporting optional trailing commas and
without introducing pass-through inconsistencies.