bump version to 2.2.4-SNAPSHOT

[noahmoss]

No description provided.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (c0d16c4) 75.30% compared to head (ba3272e) 75.30%.

❗ Current head ba3272e differs from pull request most recent head 8578003. Consider uploading reports for the commit 8578003 to get more accurate results

Additional details and impacted files

@@           Coverage Diff           @@
##           master      #73   +/-   ##
=======================================
  Coverage   75.30%   75.30%           
=======================================
  Files          10       10           
  Lines         656      656           
  Branches       90       90           
=======================================
  Hits          494      494           
  Misses         72       72           
  Partials       90       90           

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[camsaul]

If we already cut 2.2.4, then the next snapshot version should be 2.2.5-SNAPSHOT