Prepare release of 0.12.2

[jonhoo]

cargo update

clippy clean

xctrace tidy

[codecov]

Codecov Report

Attention: Patch coverage is 61.76471% with 13 lines in your changes missing coverage. Please review.

Project coverage is 90.67%. Comparing base (8455ee8) to head (0ee6f29).
Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
src/collapse/perf.rs	11.11%	8 Missing ⚠️
src/collapse/dtrace.rs	20.00%	4 Missing ⚠️
src/collapse/xctrace.rs	92.30%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #340      +/-   ##
==========================================
- Coverage   90.68%   90.67%   -0.02%     
==========================================
  Files          21       21              
  Lines        4725     4719       -6     
==========================================
- Hits         4285     4279       -6     
  Misses        440      440              

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[jonhoo]

Released as 0.12.2 🎉