🎈 5.0.0

[nkoenig]

🎈 Release

Preparation for 5.0.0 release.

Changelog has been modified in #443

Checklist

• Asked team if this is a good time for a release
• There are no changes to be ported from the previous major version
• No PRs targeted at this major version are close to getting in
• Bumped minor for new features, patch for bug fixes
• Updated changelog
• Updated migration guide (as needed)
• Link to PR updating dependency versions in appropriate repository in gazebo-release (as needed):

Note to maintainers: Remember to use Squash-Merge and edit the commit message to match the pull request summary while retaining Signed-off-by messages.

[codecov]

Codecov Report

Merging #444 (c19abfe) into gz-common5 (5076557) will not change coverage.
The diff coverage is n/a.

@@             Coverage Diff             @@
##           gz-common5     #444   +/-   ##
===========================================
  Coverage       80.45%   80.45%           
===========================================
  Files              85       85           
  Lines           10004    10004           
===========================================
  Hits             8049     8049           
  Misses           1955     1955           

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[mjcarroll]