v1.4.0

DataDrivenDiffEq v1.4.0

Diff since v1.3.0

Merged pull requests:

• Documenter 1.0 upgrade (#485) (@ArnoStrouwen)
• CompatHelper: add new compat entry for Statistics at version 1, (keep existing compat) (#488) (@github-actions[bot])
• Bump actions/cache from 3 to 4 (#493) (@dependabot[bot])
• Run JuliaFormatter.format() (#495) (@LilithHafner)
• [skip ci] reapply formatter (#498) (@ArnoStrouwen)
• Update for MTK v9 (#502) (@ChrisRackauckas)