v0.3.11: All of rendering with mixins

The main change here is that all ofs in OpenApi and JsonSchema are now translated to mixins where possible. See readme docs for more information.

What's Changed

• Update coursier to 2.1.6 by @scala-steward in #181
• Update circe-jawn to 0.14.6 by @scala-steward in #182
• Translate anyOfs to mixins where possible by @lewisjkl in #179

Full Changelog: v0.3.10...v0.3.11