fix and test on Julia v1.12

[ranocha]

Closes #13

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 98.86%. Comparing base (650297f) to head (72b67c1).

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #14      +/-   ##
==========================================
+ Coverage   98.85%   98.86%   +0.01%     
==========================================
  Files           3        3              
  Lines          87       88       +1     
==========================================
+ Hits           86       87       +1     
  Misses          1        1              

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[JoshuaLampert]

Thanks! Does that mean we need to adapt tests in Trixi.jl?

[ranocha]

Thanks for the fast review!

Thanks! Does that mean we need to adapt tests in Trixi.jl?

Right now, Trixi.jl runs tests on Julia 1.10. Let's see how experimental runs on v1.12 look like.