Update upickle to 2.0.0 (#112)

Author: scala-steward

project/plugins.sbt

@@ -7,4 +7,4 @@ addSbtPlugin("org.scalablytyped.converter" % "sbt-converter" % "1.0.0-beta37")
 addSbtPlugin("io.github.davidgregory084" % "sbt-tpolecat" % "0.3.1")
 addSbtPlugin("org.scalameta"             % "sbt-scalafmt" % "2.4.6")
 
-libraryDependencies ++= Seq("com.lihaoyi" %% "upickle" % "1.6.0")
+libraryDependencies ++= Seq("com.lihaoyi" %% "upickle" % "2.0.0")