Release 0.12.1

[macladson]

New release for:

• Reduce noise in Debug impl of VariableList and FixedVector #57
• Add benchmarks for SSZ encoding/decoding #58

Since these are backwards compatible we can just increment the minor version number here

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 58.62%. Comparing base (c557336) to head (648158e).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main      #60   +/-   ##
=======================================
  Coverage   58.62%   58.62%           
=======================================
  Files           8        8           
  Lines         290      290           
=======================================
  Hits          170      170           
  Misses        120      120           

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[michaelsproul]

Thanks, I'll let you handle the release tag + release notes. Let me know if you need more repo permissions

[michaelsproul]

PS: usually I call the branch something other than vX.Y.Z, so that it doesn't conflict with the actual tag name. E.g. call the branch cut-v0.12.1