v4.0.0-M6

What’s Changed

• More flexible upickle integration (#1969) @adamw

Dependency updates

• Update mdoc, sbt-mdoc to 2.3.8 (#1968) @softwaremill-ci
• Update sbt-ide-settings to 1.1.2 (#1967) @softwaremill-ci
• Update opentelemetry-api, ... to 1.31.0 (#1965) @softwaremill-ci
• Update jsoniter-scala-core, ... to 2.24.1 (#1964) @softwaremill-ci
• Update commons-io to 2.14.0 (#1963) @softwaremill-ci
• Update cats-effect, cats-effect-kernel, ... to 3.5.2 (#1961) @softwaremill-ci
• Update zio, zio-streams to 2.0.18 (#1960) @softwaremill-ci
• Update sbt-scalajs, scalajs-compiler to 1.14.0 (#1959) @softwaremill-ci
• Update jsoniter-scala-core, ... to 2.23.5 (#1958) @softwaremill-ci