Upgrade to Scala 2.12.5 and 2.13.0-M3, drop 2.13.0-M2.

Author: sjrd

.travis.yml

@@ -9,8 +9,8 @@ script:
 scala:
   - 2.10.7
   - 2.11.12
-  - 2.12.4
-  - 2.13.0-M2
+  - 2.12.5
+  - 2.13.0-M3
 jdk:
   - oraclejdk8
 env:

build.sbt

@@ -1,6 +1,6 @@
 import sbtcrossproject.crossProject
 
-crossScalaVersions in ThisBuild := Seq("2.12.4", "2.11.12", "2.10.7", "2.13.0-M2")
+crossScalaVersions in ThisBuild := Seq("2.12.5", "2.11.12", "2.10.7", "2.13.0-M3")
 scalaVersion in ThisBuild := (crossScalaVersions in ThisBuild).value.head
 
 val commonSettings: Seq[Setting[_]] = Seq(