Version 2.2.56

Update the 2.2 branch to test with version 1.1.4 of the desugared
library.

Bug: 180682492
Change-Id: I455b30f282e44a869dadbfbf727ef6795df351fb
diff --git a/src/main/java/com/android/tools/r8/Version.java b/src/main/java/com/android/tools/r8/Version.java
index 3fd016c..9e6f6bc 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 = "2.2.55";
+  public static final String LABEL = "2.2.56";
 
   private Version() {
   }