v0.4.46

Trixi v0.4.46

Diff since v0.4.45

Closed issues:

• create_cache Call in dgsem_tree/dg_1d.jl calls create_cache for dg.mortar which does nothing (#1216)
• Curved DGMulti tests need to be updated (#1225)

Merged pull requests:

• Delete mortar functions (do not apply in 1D), Issue 1216 (#1217) (@DanielDoehring)
• CompatHelper: bump compat for MPI to 0.20 for package test, (keep existing compat) (#1222) (@github-actions[bot])
• improve type stability of semidiscretize (#1223) (@ranocha)
• fix parabolic PID (#1224) (@ranocha)
• bump version of StartUpDG.jl and update curved DGMulti tests (#1226) (@ranocha)