Update scalatest to 3.2.20 (#216)

Co-authored-by: Mareks Rampāns <8796159+mr-git@users.noreply.github.com>

Author: scala-steward

project/Dependencies.scala

@@ -2,7 +2,7 @@ import sbt._
 
 object Dependencies {
 
-  val scalatest            = "org.scalatest"       %% "scalatest"          % "3.2.19"
+  val scalatest            = "org.scalatest"       %% "scalatest"          % "3.2.20"
   val `testcontainers-cassandra` = "com.dimafeng"           %% "testcontainers-scala-cassandra"  % "0.44.1"
   val `future-helper`      = "com.evolutiongaming" %% "future-helper"      % "1.0.7"
   val scassandra           = "com.evolutiongaming" %% "scassandra"         % "5.4.0"