Bump version

Author: kou

ext/groonga/rb-grn.h

@@ -93,7 +93,7 @@ RB_GRN_BEGIN_DECLS
 
 #define RB_GRN_MAJOR_VERSION 12
 #define RB_GRN_MINOR_VERSION 0
-#define RB_GRN_MICRO_VERSION 2
+#define RB_GRN_MICRO_VERSION 3
 
 #define RB_GRN_OBJECT(object) ((RbGrnObject *)(object))
 #define RB_GRN_NAMED_OBJECT(object) ((RbGrnNamedObject *)(object))