Correct language setting for travis.
Correct language setting for travis.

ycsoft/lua-rapidjson,ignacio/lua-rapidjson,ycsoft/lua-rapidjson,ycsoft/lua-rapidjson,ignacio/lua-rapidjson,ignacio/lua-rapidjson,tvbeat/lua-rapidjson,tvbeat/lua-rapidjson,ycsoft/lua-rapidjson,xpol/lua-rapidjson,xpol/lua-rapidjson,ignacio/lua-rapidjson