v0.3.1

KernelInterpolation v0.3.1

Diff since v0.3.0

Merged pull requests:

• Bump julia-actions/julia-format from 3 to 4 (#123) (@dependabot[bot])
• Bump crate-ci/typos from 1.31.1 to 1.31.2 (#124) (@dependabot[bot])
• Use TrixiTest.jl (#125) (@JoshuaLampert)
• Some small performance optimizations (#126) (@JoshuaLampert)