Circe 0.14.0-M5

This release introduces Scala 3.0.0-RC2 support (and drops 3.0.0-RC1). It also includes several improvements:

• Deprecation clean-up by @diesalbla (#1683)
• Compiler and build warning by @nilsmahlstaedt (#1685)
• Source mapping for Scala.js by @fthomas (#1703)

Please see the 0.14.0-M4 release notes for information about which modules are published for Scala 3, and for details about their status. Note that the Refined integration module is not published for Scala 3 in this milestone, because of an issue involving scala-xml (we will fix this before 0.14.0).

This milestone release is not backward-binary-compatible with 0.13.x or previous 0.14.0 milestones, and there are no guarantees about binary compatibility with future 0.14.0 releases. In general the points of breakage with previous releases should be limited to deprecated methods, but please take care if using this milestone with other libraries published against earlier releases of Circe.