Update scalatest to 3.2.20 (#322)

Author: scala-steward

project/Deps.scala

@@ -5,7 +5,7 @@ import org.portablescala.sbtplatformdeps.PlatformDepsPlugin.autoImport._
 object Deps {
   import Def.{setting => dep}
 
-  val scalaTest = dep("org.scalatest" %%% "scalatest" % "3.2.19")
+  val scalaTest = dep("org.scalatest" %%% "scalatest" % "3.2.20")
 
   val scalaReflect = dep("org.scala-lang" % "scala-reflect")
   val cats = dep("org.typelevel" %%% "cats-core" % "2.13.0")