v0.4.55

Trixi v0.4.55

Diff since v0.4.54

Closed issues:

• MethodError when using flux tuple in combination with BoundaryConditionDirichlet and TreeMesh (#1243)

Merged pull requests:

• Tree Mesh 2D Dirichlet (#1251) (@maxbertrand1996)
• Upwind finite difference SBP solver (#1275) (@ranocha)
• Upwind FDSBP performance improvements (#1282) (@ranocha)
• upwind tutorial (#1283) (@ranocha)
• Upwind FDSBP cleanup, part 2 (#1285) (@ranocha)