Silence warning in 1.12+

[christiangnrd]

Register 0.5.1 after this is merged?

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 66.84%. Comparing base (ec873b3) to head (6850658).
Report is 12 commits behind head on master.

Additional details and impacted files

@@           Coverage Diff           @@
##           master      #91   +/-   ##
=======================================
  Coverage   66.84%   66.84%           
=======================================
  Files           3        3           
  Lines         184      184           
=======================================
  Hits          123      123           
  Misses         61       61           

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[christiangnrd]

Replaced pre with 1.12-nightly to actually test on 1.12. I can revert before this is merged. Edit: I've reverted to make this mergeable as-is, here is a link to a passing 1.12 run.