Update management protocol to be compatible with NFD 0.6.2

Change-Id: I85975151d969901b842c83c649ccd86059488274
diff --git a/build.gradle b/build.gradle
index cd2bfee..5e662e9 100644
--- a/build.gradle
+++ b/build.gradle
@@ -18,7 +18,7 @@
 
 // group = 'com.intel.jndn.management'
 group = 'net.named-data.jndn-extra'
-version = '1.1.4'
+version = '1.2.1'
 
 sourceCompatibility = JavaVersion.VERSION_1_8
 targetCompatibility = JavaVersion.VERSION_1_8