Update cromwell version from 30 to 31

cjllanwarne · cjllanwarne · commit 1b1a56372659 · 2017-12-04T15:59:56.000-05:00
diff --git a/project/Version.scala b/project/Version.scala
@@ -5,7 +5,7 @@ import sbt._
 
 object Version {
   // Upcoming release, or current if we're on a master / hotfix branch
-  val cromwellVersion = "30"
+  val cromwellVersion = "31"
 
   // Adapted from SbtGit.versionWithGit
   def cromwellVersionWithGit: Seq[Setting[_]] =
