Don't MiMa on 2.13

Author: lrytz

build.sbt

@@ -91,7 +91,11 @@ lazy val sharedSettings = MimaSettings.settings ++ scalaVersionSettings ++ Seq(
   // don't use fatal warnings in tests
   scalacOptions in Test ~= (_ filterNot (_ == "-Xfatal-warnings")),
 
-  mimaPreviousArtifacts := Set("org.scalacheck" %% "scalacheck" % "1.14.0"),
+  mimaPreviousArtifacts := {
+    // TODO: re-enable MiMa for 2.13.0-M4 once there is a release out
+    if (scalaMajorVersion.value == 13) Set()
+    else Set("org.scalacheck" %% "scalacheck" % "1.14.0")
+  },
 
   publishTo := {
     val nexus = "https://oss.sonatype.org/"