java: default to vom version 81

MultiPart: 3/3
Change-Id: I7626d2480483fc5d02273f2c5f1a7ee86f94524d
diff --git a/lib/src/main/java/io/v/v23/vom/Version.java b/lib/src/main/java/io/v/v23/vom/Version.java
index 3dc6935..16d39d0 100644
--- a/lib/src/main/java/io/v/v23/vom/Version.java
+++ b/lib/src/main/java/io/v/v23/vom/Version.java
@@ -27,6 +27,6 @@
         throw new RuntimeException("invalid version byte " + b);
     }
 
-    public static Version DEFAULT_VERSION = Version80;
+    public static Version DEFAULT_VERSION = Version81;
 
 }