Change version to 1.66.1-dev

[arjan-bal]

RELEASE NOTES: None

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 81.73%. Comparing base (973e3dc) to head (e81b6b6).
Report is 2 commits behind head on v1.66.x.

Additional details and impacted files

@@             Coverage Diff             @@
##           v1.66.x    #7519      +/-   ##
===========================================
- Coverage    81.86%   81.73%   -0.13%     
===========================================
  Files          361      361              
  Lines        27858    27858              
===========================================
- Hits         22805    22770      -35     
- Misses        3855     3879      +24     
- Partials      1198     1209      +11     

see 20 files with indirect coverage changes

[dfawley]

FYI this is very important to merge immediately after the release so nobody cherry-picks something else first.

[arjan-bal]

FYI this is very important to merge immediately after the release so nobody cherry-picks something else first.

Acknowledged