Move to sbt-jmh 0.4.2

Also add extra local/snapshot resolvers to test sbt-jmh pre-releases

Author: retronym

build.sbt

@@ -1,3 +1,4 @@
+
 name := "compiler-benchmark"
 
 version := "1.0-SNAPSHOT"
@@ -26,11 +27,13 @@ resolvers in ThisBuild ++= (
   if (scalaVersion.value.endsWith("-SNAPSHOT"))
     List(
       "pr-scala snapshots" at "https://scala-ci.typesafe.com/artifactory/scala-pr-validation-snapshots/",
-      Resolver.mavenLocal)
+      )
   else
     Nil
 )
 
+resolvers in ThisBuild += Resolver.mavenLocal
+
 lazy val infrastructure = addJmh(project).settings(
   description := "Infrastrucuture to persist benchmark results annotated with metadata from Git",
   autoScalaLibrary := false,
@@ -61,7 +64,7 @@ lazy val compilation = addJmh(project).settings(
   mainClass in (Jmh, run) := Some("scala.bench.ScalacBenchmarkRunner"),
   libraryDependencies += "com.novocode" % "junit-interface" % "0.11" % Test,
   testOptions in Test += Tests.Argument(TestFrameworks.JUnit),
-  fork in (Test, test) := true // jmh scoped tasks run with fork := true.
+  fork in (Test, test) := true, // jmh scoped tasks run with fork := true.
 ).settings(addJavaOptions).dependsOn(infrastructure)
 
 lazy val micro = addJmh(project).settings(

project/plugins.sbt

@@ -1,8 +1,10 @@
 // Comment to get more information during initialization
 logLevel := Level.Warn
 
+resolvers += Opts.resolver.sonatypeSnapshots
+
 // sbt-jmh plugin - pulls in JMH dependencies too
-addSbtPlugin("pl.project13.scala" % "sbt-jmh" % "0.4.0")
+addSbtPlugin("pl.project13.scala" % "sbt-jmh" % "0.4.2")
 
 // sbt-dotty plugin - to support `scalaVersion := "0.x"`
 addSbtPlugin("ch.epfl.lamp" % "sbt-dotty" % "0.4.2")