从 SBT 0.13.6 开始，驱逐现在是警告。
[warn] Scala version was updated by one of library dependencies:
[warn] * org.scala-lang:scala-library:(2.10.4, 2.10.1, 2.10.3, 2.10.0) -> 2.10.2
[warn] * org.scala-lang:scala-compiler:2.10.0 -> 2.10.4
[warn] To force scalaVersion, add the following:
[warn] ivyScala := ivyScala.value map { _.copy(overrideScalaVersion = true) }
[warn] There may be incompatibilities among your library dependencies.
[warn] Here are some of the libraries that were evicted:
[warn] * org.apache.httpcomponents:httpclient:(4.1.3, [4.1, 4.2)) -> 4.0.1
[warn] * org.specs2:specs2_2.10:(1.12.3, 2.3.13) -> 2.4.2
[warn] Run 'evicted' to see detailed eviction warnings
如何抑制这些警告？