update CHANGELOG and AUTHORS for v1.4.0 release

[rkingsbury]

Summary

• Update CHANGELOG
• Add @vineetbansal to AUTHORS
• exclude AUTHORS.md from unit tests

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 86.10%. Comparing base (ad35082) to head (804ed87).
⚠️ Report is 6 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #356   +/-   ##
=======================================
  Coverage   86.10%   86.10%           
=======================================
  Files          14       14           
  Lines        1821     1821           
  Branches      313      313           
=======================================
  Hits         1568     1568           
  Misses        209      209           
  Partials       44       44           

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