Update scalacheck to 1.15.2 (scala#147)

Author: scala-steward

build.sbt

@@ -34,7 +34,7 @@ lazy val junit = project.in(file("junit"))
 lazy val scalacheck = project.in(file("scalacheck"))
  .settings(commonSettings)
  .settings(
- libraryDependencies += "org.scalacheck" %% "scalacheck" % "1.15.1",
+ libraryDependencies += "org.scalacheck" %% "scalacheck" % "1.15.2",
  Test / fork := true,
  Test / testOptions += Tests.Argument(TestFrameworks.ScalaCheck, "-workers", "1", "-minSize", "0", "-maxSize", "4000", "-minSuccessfulTests", "5"),
  publish / skip := true