Version 2.1.0-dev

Branching for 2.1

src/main/java/com/android/tools/r8/Version.java

diff --git a/src/main/java/com/android/tools/r8/Version.java b/src/main/java/com/android/tools/r8/Version.java
index d01ede5..ea71d26 100644
--- a/src/main/java/com/android/tools/r8/Version.java
+++ b/src/main/java/com/android/tools/r8/Version.java
@@ -11,7 +11,7 @@
 
   // This field is accessed from release scripts using simple pattern matching.
   // Therefore, changing this field could break our release scripts.
-  public static final String LABEL = "master";
+  public static final String LABEL = "2.1.0-dev";
 
   private Version() {
   }