Fix resolvers

Author: jllopes

project/plugins.sbt

@@ -1,13 +1,9 @@
+import sbt.Keys.resolvers
 import sbt._
 
-resolvers ++= Seq(
-  DefaultMavenRepository,
-  "Typesafe Repository" at "http://repo.typesafe.com/typesafe/releases/",
-  "Bintray Repository" at "https://dl.bintray.com/sbt/ivy-releases/",
-  "Sonatype snapshots" at "http://oss.sonatype.org/content/repositories/snapshots/",
-  Classpaths.typesafeReleases,
-  Classpaths.sbtPluginReleases
-)
+resolvers := Seq(Resolver.bintrayIvyRepo("typesafe", "ivy-releases"),
+  Resolver.bintrayRepo("typesafe", "maven-releases"),
+  Resolver.bintrayRepo("sbt", "maven-releases")) ++ resolvers.value
 
 addSbtPlugin("org.xerial.sbt" % "sbt-sonatype" % "2.3")