v0.4.43

Trixi v0.4.43

Diff since v0.4.42

Closed issues:

• Type instability in prolong2mortars! for P4estMesh (#1185)
• Issue with slip wall BCs for CompressibleEulerEquations2D using TreeMesh (#1190)

Merged pull requests:

• Add JuliaCon announcement to README (#1172) (@sloede)
• Small additions to docs (#1186) (@Arpit-Babbar)
• Fix #1185 (#1189) (@ranocha)
• fix boundary_condition_slip_wall for 2D TreeMesh (#1191) (@ranocha)