move to sbt 1 and sbt-scala-module 2.x series

motivation is simply to be the first guinea pig for
this transition. if it works here we'll do the other modules

Author: SethTisue

build.sbt

@@ -7,7 +7,7 @@ name    := "scala-partest"
 version := "1.1.4-SNAPSHOT"
 
 scalaVersionsByJvm in ThisBuild := {
-  val vs = List("2.12.7")
+  val vs = List("2.12.8")
 
   Map(
     8 -> vs.map(_ -> true),

project/build.properties

@@ -1 +1 @@
-sbt.version=0.13.17
+sbt.version=1.2.8

project/plugins.sbt

@@ -1 +1 @@
-addSbtPlugin("org.scala-lang.modules" % "sbt-scala-module" % "1.0.14")
+addSbtPlugin("org.scala-lang.modules" % "sbt-scala-module" % "2.0.0")