1.2.0 <- 1.1.1

`operator=()` (which already performed a deep-copy) now includes
comments. The change is probably harmless in all practical cases.
diff --git a/include/json/version.h b/include/json/version.h
index baf5daa..4565dc1 100644
--- a/include/json/version.h
+++ b/include/json/version.h
@@ -4,10 +4,10 @@
 #ifndef JSON_VERSION_H_INCLUDED
 # define JSON_VERSION_H_INCLUDED
 
-# define JSONCPP_VERSION_STRING "1.1.1"
+# define JSONCPP_VERSION_STRING "1.2.0"
 # define JSONCPP_VERSION_MAJOR 1
-# define JSONCPP_VERSION_MINOR 1
-# define JSONCPP_VERSION_PATCH 1
+# define JSONCPP_VERSION_MINOR 2
+# define JSONCPP_VERSION_PATCH 0
 # define JSONCPP_VERSION_QUALIFIER
 # define JSONCPP_VERSION_HEXA ((JSONCPP_VERSION_MAJOR << 24) | (JSONCPP_VERSION_MINOR << 16) | (JSONCPP_VERSION_PATCH << 8))