MiMa: filter out false positive

Author: SethTisue

build.sbt

@@ -14,7 +14,14 @@ lazy val commonSettings = Seq(
                                                  |See the NOTICE file distributed with this work for
                                                  |additional information regarding copyright ownership.
                                                  |""".stripMargin)),
-  scalaModuleMimaPreviousVersion := Some("2.1.6")
+  scalaModuleMimaPreviousVersion := Some("2.1.6"),
+  mimaBinaryIssueFilters ++= {
+    import com.typesafe.tools.mima.core._
+    import com.typesafe.tools.mima.core.ProblemFilters._
+    Seq(
+      exclude[ReversedMissingMethodProblem]("scala.collection.compat.PackageShared.*"), // it's package-private
+    )
+  }
 )
 
 lazy val root = project