Added Support for Scala 2.12.4

Author: Mahendra Kulkarni

.travis.yml

@@ -33,6 +33,7 @@ env:
   - SCALA_VERSION=2.12.1
   - SCALA_VERSION=2.12.2
   - SCALA_VERSION=2.12.3
+  - SCALA_VERSION=2.12.4
   - SCALA_VERSION=2.13.0-M2
 
 # there's no better way it seems.. https://github.com/travis-ci/travis-ci/issues/1519
@@ -47,6 +48,8 @@ matrix:
       env: SCALA_VERSION=2.12.2
     - jdk: openjdk6
       env: SCALA_VERSION=2.12.3
+    - jdk: openjdk6
+      env: SCALA_VERSION=2.12.4
     - jdk: openjdk6
       env: SCALA_VERSION=2.13.0-M2
 

build.sbt

@@ -51,7 +51,7 @@ lazy val defaults = Seq(
   scalaVersion := crossScalaVersions.value.last,
   crossScalaVersions := {
     val latest211 = 11
-    val latest212 = 3
+    val latest212 = 4
     val pre213 = List("M2")
     val skipVersions = Set("2.11.9", "2.11.10")
     val scala211Versions =