title: How to set up 'resolvers' to get the latest ScalaTest automatically?
body: <p>I'm running Scala 2.9.2 and ScalaTest 2.0M4. I have a local copy of the ScalaTest jar and would now like to get it automatically from a repo.</p>
  
  <p><a href="http://www.scalatest.org/download#20m4" rel="nofollow">Scalatest site</a> says this about it:</p>
  
  <pre><code>..is available [at] the Sonatype OSS Maven repository (which is mirrored on the central Maven repository as well):
  
  group id: org.scalatest
  artifact id: scalatest_2.9.0 (for Scala 2.9.0+)
  version: 2.0.M4
  Or via sbt (version 0.10 or higher) with:
  
  libraryDependencies += "org.scalatest" %% "scalatest" % "2.0.M4" % "test"
  </code></pre>
  
  <p>Now, what 'resolvers' must I add to my 'project/plugins.sbt' to reach this?</p>