Version bumps

Author: rtyley

build.sbt

@@ -1,8 +1,8 @@
 import ReleaseTransformations._
 
 lazy val baseSettings = Seq(
-  scalaVersion := "2.12.3",
-  crossScalaVersions := Seq(scalaVersion.value, "2.11.11"),
+  scalaVersion := "2.12.8",
+  crossScalaVersions := Seq(scalaVersion.value, "2.11.12"),
   organization := "com.madgag.scala-git",
   scmInfo := Some(ScmInfo(
     url("https://github.com/rtyley/scala-git"),

project/build.properties

@@ -1 +1 @@
-sbt.version=1.0.2
+sbt.version=1.2.8

project/plugins.sbt

@@ -1,5 +1,5 @@
-addSbtPlugin("com.github.gseitz" % "sbt-release" % "1.0.6")
+addSbtPlugin("com.github.gseitz" % "sbt-release" % "1.0.11")
 
-addSbtPlugin("org.xerial.sbt" % "sbt-sonatype" % "2.0")
+addSbtPlugin("org.xerial.sbt" % "sbt-sonatype" % "2.4")
 
-addSbtPlugin("com.jsuereth" % "sbt-pgp" % "1.1.0")
+addSbtPlugin("com.jsuereth" % "sbt-pgp" % "1.1.2")