Update scala-collection-compat to 2.9.0

Author: 47erbot

build.sbt

@@ -14,7 +14,7 @@ addCommandAlias("ci-publish", ";github; ci-release")
 
 lazy val V = new {
   val cats: String                = "2.9.0"
-  val collectioncompat: String    = "2.8.1"
+  val collectioncompat: String    = "2.9.0"
   val github4s: String            = "0.31.2"
   val http4s: String              = "0.23.12"
   val runtime: String             = "0.7.0"