chore: Some dependency updates

chore(deps): Update all dependency shas to sha-512

This updates all the dependency shas without touching their actual versions.

chore(deps): Migrate to @evilmartians/lefthook

The @arkweid/lefthook dependency is deprecated.

chore(deps): Remove direct dependency on bootstrap-vue

We are getting it as an indirect dependency from @gitlab/ui. Direct version bumps in Pajamas are not needed.