From e1fc94dfd4d5f83517f147a771fd129b05f1b2be Mon Sep 17 00:00:00 2001
From: Eugene Yokota <eed3si9n@gmail.com>
Date: Sun, 27 May 2018 18:35:35 -0400
Subject: [PATCH] Scala 2.13.0-M4

---
 build.sbt                  | 14 ++++++++++++++
 project/Dependencies.scala |  2 +-
 2 files changed, 15 insertions(+), 1 deletion(-)

diff --git a/build.sbt b/build.sbt
index 7142bb52..f8323f39 100644
--- a/build.sbt
+++ b/build.sbt
@@ -58,4 +58,18 @@ val io = (project in file("io"))
       // protected[this]
       exclude[DirectMissingMethodProblem]("sbt.io.CopyOptions.copy*"),
     ),
+    scalacOptions := {
+      val old = scalacOptions.value
+      scalaBinaryVersion.value match {
+        case "2.12" => old
+        case _ =>
+          old filterNot Set(
+            "-Xfatal-warnings",
+            "-deprecation",
+            "-Ywarn-unused",
+            "-Ywarn-unused-import",
+            "-Yno-adapted-args",
+          )
+      }
+    }
   )
diff --git a/project/Dependencies.scala b/project/Dependencies.scala
index 0ce2eb64..b62d1584 100644
--- a/project/Dependencies.scala
+++ b/project/Dependencies.scala
@@ -5,7 +5,7 @@ object Dependencies {
   val scala210 = "2.10.7"
   val scala211 = "2.11.12"
   val scala212 = "2.12.6"
-  val scala213 = "2.13.0-M3"
+  val scala213 = "2.13.0-M4"
 
   val scalaCompiler = Def.setting { "org.scala-lang" % "scala-compiler" % scalaVersion.value }