Vulcan v1.4.0

User-facing changes

• Add Codec#Repr type member to improve type safety of encoding (#272, #279) @bplommer
• Fix to enum decoding behaviour (#270) @bplommer

Dependency updates

• Update cats-free, cats-testkit to 2.4.1 (#281) @scala-steward
• Update sbt-mdoc to 2.2.17 (#277) @scala-steward
• Update sbt to 1.4.7 (#274) @scala-steward
• Update scala-collection-compat to 2.4.1 (#273) @scala-steward
• Update sbt-dotty to 0.5.2 (#267) @scala-steward
• Update kind-projector to 0.11.3 (#263) @scala-steward

Internals

• Reduce duplication between codecs (#266) @bplommer
• Use right packages/modules for test examples (#260) @bplommer