Update scalatest to 3.2.18 (#330)

Author: scala-steward

build.sbt

@@ -107,7 +107,7 @@ lazy val sbtgen = (project in file("sbtgen"))
     //    libraryDependencies += "com.github.scopt" %% "scopt" % "4.0.0-RC2",
     libraryDependencies += "com.github.scopt" %% "scopt" % "3.7.1",
     libraryDependencies += "org.scala-lang.modules" %% "scala-collection-compat" % "2.11.0",
-    (ThisBuild / libraryDependencies) += "org.scalatest" %% "scalatest" % "3.2.17" % Test,
+    (ThisBuild / libraryDependencies) += "org.scalatest" %% "scalatest" % "3.2.18" % Test,
     scalacOptions ++= Seq(
       s"-Xmacro-settings:product-version=${version.value}",
       s"-Xmacro-settings:product-group=${organization.value}",