Bump version to 0.2

Change-Id: Ie4ac30cd0ada494f8b7f5d6d77218e6b60a5e800
Refs: #3132
diff --git a/core/version.cpp b/core/version.cpp
index 3195e68..bf8dc7f 100644
--- a/core/version.cpp
+++ b/core/version.cpp
@@ -22,7 +22,7 @@
 namespace ndn {
 namespace tools {
 
-const char VERSION[] = "0.1.0-dev";
+const char VERSION[] = "0.2";
 
 } // namespace tools
 } // namespace ndn