v0.4.14

Trixi v0.4.14

Diff since v0.4.13

Merged pull requests:

• Reorganizing DGMulti mesh types (#1012) (@jlchan)
• Enable periodic FDSBP operators on stretched domains (#1014) (@jlchan)
• use new feature xmin/xmax of SummationByPartsOperators.jl (#1015) (@ranocha)