v0.13.1

There's a couple of breaking changes in this release. Some background information can be found here: https://blog.softwaremill.com/tapir-codecs-get-an-update-c9801889cbf3

A non-comprehensive summary of the breaking changes:

• Codec[H, CF, L] becomes Codec[L, H, CF]
• CodecForMany and CodecForOptional is removed. Instead, use Codec[List[...], ...] or Codec[Option[...], ...]
• List replaced some usages of Seq, in the types to which endpoint inputs/outputs mapped
• if you are using custom (implicit) json codecs, for json bodies you should use anyJsonBody