Bump version to 2.0

Author: ashawley

build.sbt

@@ -11,7 +11,7 @@ lazy val xml = crossProject(JSPlatform, JVMPlatform)
   .jvmSettings(scalaModuleSettingsJVM)
   .settings(
     name    := "scala-xml",
-    version := "1.2.1-SNAPSHOT",
+    version := "2.0.0-SNAPSHOT",
 
     // this line could be removed after https://github.com/scala/sbt-scala-module/issues/48 is fixed
     licenses := Seq(("Apache-2.0", url("https://www.apache.org/licenses/LICENSE-2.0"))),