v4.6.0

This release brings:

• A new module for upickle support (see #401 by @esarbe).
• Contribution guidelines regarding copyright have also been updated (see #403 by @satabin).
• Pinning of Scala 3 to the 3.3 series (LTS) to increase compatibility.

It also updates following library dependencies (by @scala-steward):

• Update sbt-scalajs, scalajs-compiler, ... to 1.16.0
• Update scala3-library, ... to 3.3.3
• Update sbt-typelevel to 0.6.7
• Update scala-library to 2.12.19
• Update sbt to 1.9.9
• Update scalatest to 3.2.18
• Update ujson, upickle to 3.1.4
• Update nscplugin, sbt-scala-native, ... to 0.4.17
• Update play-json to 3.0.2
• Update sbt-jmh to 0.4.7

This release was brought to you by following contributors:

git shortlog -sn --no-merges v4.5.0..v4.6.0
    14  Scala Steward
     8  Raphael Bosshard
     6  Lucas Satabin