Update scalatest to 3.2.18 (#1336)

Author: scala-steward

project/Dependencies.scala

@@ -74,7 +74,7 @@ object Dependencies {
   val sbinary = "org.scala-sbt" %% "sbinary" % "0.5.1"
   val scalaXml = "org.scala-lang.modules" %% "scala-xml" % "2.2.0"
   val scalaCheck = "org.scalacheck" %% "scalacheck" % "1.17.0"
-  val scalatest = "org.scalatest" %% "scalatest" % "3.2.17"
+  val scalatest = "org.scalatest" %% "scalatest" % "3.2.18"
   val verify = "com.eed3si9n.verify" %% "verify" % "2.0.1"
   val sjsonnew = Def.setting {
     "com.eed3si9n" %% "sjson-new-core" % contrabandSjsonNewVersion.value