v0.5.4

DispersiveShallowWater v0.5.4

Diff since v0.5.3

Merged pull requests:

• Add linear dispersion relation (#168) (@JoshuaLampert)
• Bump crate-ci/typos from 1.28.1 to 1.29.0 (#169) (@dependabot[bot])
• use banded matrix decomposition instead of dense LU for BBM-BBM (#170) (@ranocha)
• Bump crate-ci/typos from 1.29.0 to 1.29.5 (#171) (@dependabot[bot])