Fix build release job following actions v4 upgrade

Bump 2.1 (SMTorg#472)

Trigger pypi upload only on tag push

Use v tag to release on Pypi

Fix CIBW_SKIP variable name (grrr!)

Prepare release 2.0.1 (SMTorg#461)

* Specify wheels to build instead of to skip

* Bump 2.0.1

Trigger on push on any branch for test

Add convenient get_typename method to DesignVariable (SMTorg#452)

Prepare release 2.0b3 (SMTorg#432)

* Enforce black format

* Bump 2.0b3

* Format with black 23.3.0

* Update doc

Prepare 2.0b2 (SMTorg#427)

* Bump version 2.0b2

* Use black 23.3.0 to reformat