Merge pull request #452 from scala-steward/update/munit-0.7.21

Update munit to 0.7.21

build.sbt

@@ -113,7 +113,7 @@ lazy val sharedSettings = List(
 
 val V = new {
   val scalameta = "4.4.7"
-  val munit = "0.7.20"
+  val munit = "0.7.21"
   val coursier = "1.0.2"
   val scalacheck = "1.15.2"
 }