version.h: fix the version number in the header

Fixes: #1224

Author: mathstuf

include/json/version.h

@@ -12,7 +12,7 @@
 #define JSONCPP_VERSION_STRING "1.9.4"
 #define JSONCPP_VERSION_MAJOR 1
 #define JSONCPP_VERSION_MINOR 9
-#define JSONCPP_VERSION_PATCH 3
+#define JSONCPP_VERSION_PATCH 4
 #define JSONCPP_VERSION_QUALIFIER
 #define JSONCPP_VERSION_HEXA                                                   \
   ((JSONCPP_VERSION_MAJOR << 24) | (JSONCPP_VERSION_MINOR << 16) |             \