Bump uPickle to 4.1.0 (#3280)

Changelog https://com-lihaoyi.github.io/upickle/#4.0.0

This is a binary incompatible change and will need to go into 0.13.0

Author: lihaoyi

build.mill

@@ -192,7 +192,7 @@ object Deps {
   val semanticDBscala = ivy"org.scalameta:::semanticdb-scalac:4.12.4"
   val semanticDbJava = ivy"com.sourcegraph:semanticdb-java:0.10.3"
   val sourcecode = ivy"com.lihaoyi::sourcecode:0.4.3-M5"
-  val upickle = ivy"com.lihaoyi::upickle:3.3.1"
+  val upickle = ivy"com.lihaoyi::upickle:4.1.0"
   val windowsAnsi = ivy"io.github.alexarchambault.windows-ansi:windows-ansi:0.0.6"
   val zinc = ivy"org.scala-sbt::zinc:1.10.7".withDottyCompat(scalaVersion)
   // keep in sync with doc/antora/antory.yml

example/scalalib/native/4-common-config/build.mill

@@ -35,7 +35,7 @@ object `package` extends RootModule with ScalaNativeModule {
 Value: <h1>hello</h1>
 
 > ./mill show releaseMode
-"mill.scalanativelib.api.ReleaseMode.ReleaseFast"
+"ReleaseFast"
 
 > ./mill show nativeIncrementalCompilation
 true