Master branch updates

[chapulina]

Part of gazebo-tooling/release-tools#416

Summary

Update all usage of master

Checklist

• Signed all commits for DCO
• Added tests
• Updated documentation (as needed)
• Updated migration guide (as needed)
• codecheck passed (See contributing)
• All tests passed (See test coverage)
• While waiting for a review on your PR, please help review another open pull request to support the maintainers

Note to maintainers: Remember to use Squash-Merge

[codecov]

Codecov Report

Merging #187 (56fdc8a) into ign-gui3 (c9c4f80) will not change coverage.
The diff coverage is n/a.

@@            Coverage Diff            @@
##           ign-gui3     #187   +/-   ##
=========================================
  Coverage     60.55%   60.55%           
=========================================
  Files            21       21           
  Lines          2624     2624           
=========================================
  Hits           1589     1589           
  Misses         1035     1035           

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