jsoncpp: update to 1.9.6 (#5302)

packages/j/jsoncpp/xmake.lua

@@ -1,12 +1,13 @@
 package("jsoncpp")
-
     set_homepage("https://github.com/open-source-parsers/jsoncpp/wiki")
     set_description("A C++ library for interacting with JSON.")
+    set_license("MIT")
 
     add_urls("https://github.com/open-source-parsers/jsoncpp/archive/$(version).zip",
              "https://github.com/open-source-parsers/jsoncpp.git")
     add_versions("1.9.4", "6da6cdc026fe042599d9fce7b06ff2c128e8dd6b8b751fca91eb022bce310880")
     add_versions("1.9.5", "a074e1b38083484e8e07789fd683599d19da8bb960959c83751cd0284bdf2043")
+    add_versions("1.9.6", "0d445d6e956fb62d69ec6895b0000ea6caddf0680373a0d5a37b719c7fbf369b")
 
     add_deps("cmake")
     on_load(function (package)