Update scalacheck to 1.16.0 (#636)

Author: scala-steward

build.sbt

@@ -80,7 +80,7 @@ lazy val msgpackCore = Project(id = "msgpack-core", base = file("msgpack-core"))
       "org.wvlet.airframe" %% "airframe-json" % AIRFRAME_VERSION % "test",
       "org.wvlet.airframe" %% "airspec"       % AIRFRAME_VERSION % "test",
       // Add property testing support with forAll methods
-      "org.scalacheck" %% "scalacheck" % "1.15.4" % "test",
+      "org.scalacheck" %% "scalacheck" % "1.16.0" % "test",
       // For performance comparison with msgpack v6
       "org.msgpack" % "msgpack" % "0.6.12" % "test",
       // For integration test with Akka