Enhance Release CI

[isc-shuliu]

• Remove unreferenced environment variables
• Only publish a release if the new tag uses semantic versioning
• Use the newly pushed tag (rather than the latest tag) for release. Most of them time they should be the same thing.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (0c2ff29) 38.98% compared to head (30d2f7d) 38.98%.

Additional details and impacted files

@@           Coverage Diff           @@
##           master      #31   +/-   ##
=======================================
  Coverage   38.98%   38.98%           
=======================================
  Files          14       14           
  Lines        1244     1244           
=======================================
  Hits          485      485           
  Misses        759      759           

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