Remove compat helper in favor of dependabot

[benegee]

Thanks to trixi-framework/Trixi.jl#3022

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 96.11%. Comparing base (2f2c33e) to head (ddda950).

Additional details and impacted files

@@                 Coverage Diff                 @@
##           bg/lowstoragerk-v3     #294   +/-   ##
===================================================
  Coverage               96.11%   96.11%           
===================================================
  Files                      25       25           
  Lines                    1260     1260           
  Branches                   74       74           
===================================================
  Hits                     1211     1211           
  Misses                     45       45           
  Partials                    4        4           

Flag	Coverage Δ
unittests	96.11% <ø> (ø)

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[benegee]

CI failure seems to be related to #268 again, not to this PR.