Update Scala to version 2.12.4

.travis.yml

@@ -2,7 +2,7 @@ language: scala
 scala:
     - 2.10.6
     - 2.11.11
-    - 2.12.3
+    - 2.12.4
 jdk:
     - oraclejdk8
 script:

build.sbt

@@ -38,8 +38,8 @@ lazy val commonSettings = Seq(
   homepage := Some(url("https://github.com/pureconfig/pureconfig")),
   licenses := Seq("Mozilla Public License, version 2.0" -> url("https://www.mozilla.org/MPL/2.0/")),
 
-  scalaVersion := "2.12.3",
-  crossScalaVersions := Seq("2.10.6", "2.11.11", "2.12.3"),
+  scalaVersion := "2.12.4",
+  crossScalaVersions := Seq("2.10.6", "2.11.11", "2.12.4"),
 
   resolvers ++= Seq(
     Resolver.sonatypeRepo("releases"),
@@ -60,8 +60,9 @@ lazy val commonSettings = Seq(
   scalacOptions in (Test, console) := (scalacOptions in (Compile, console)).value,
 
   // use sbt <module_name>/test:console to run an ammonite console
-  libraryDependencies += "com.lihaoyi" % "ammonite" % "1.0.1" % "test" cross CrossVersion.patch,
-  initialCommands in (Test, console) := """ammonite.Main().run()""",
+  // disabled until Ammonite is published for Scala 2.12.4
+  // libraryDependencies += "com.lihaoyi" % "ammonite" % "1.0.1" % "test" cross CrossVersion.patch,
+  // initialCommands in (Test, console) := """ammonite.Main().run()""",
 
   scalariformPreferences := scalariformPreferences.value
     .setPreference(DanglingCloseParenthesis, Prevent)