Update case-app to 2.1.0 (#326)

Author: scala-steward

build.sbt

@@ -69,7 +69,7 @@ lazy val cli = project
     publish / skip := true,
     libraryDependencies ++= Seq(
       "com.outr" %% "scribe-slf4j" % scribeVersion,
-      "com.github.alexarchambault" %% "case-app" % "2.0.6",
+      "com.github.alexarchambault" %% "case-app" % "2.1.0",
       "io.circe" %% "circe-yaml" % "0.14.2",
     ),
     gitCommitString := git.gitHeadCommit.value.getOrElse("Not Set"),