[CMake] Generate CMake config files by default

CMakeLists.txt

@@ -9,7 +9,7 @@ OPTION(JSONCPP_WITH_POST_BUILD_UNITTEST "Automatically run unit-tests as a post
 OPTION(JSONCPP_WITH_WARNING_AS_ERROR "Force compilation to fail if a warning occurs" OFF)
 OPTION(JSONCPP_WITH_STRICT_ISO "Issue all the warnings demanded by strict ISO C and ISO C++" ON)
 OPTION(JSONCPP_WITH_PKGCONFIG_SUPPORT "Generate and install .pc files" ON)
-OPTION(JSONCPP_WITH_CMAKE_PACKAGE "Generate and install cmake package files" OFF)
+OPTION(JSONCPP_WITH_CMAKE_PACKAGE "Generate and install cmake package files" ON)
 OPTION(BUILD_SHARED_LIBS "Build jsoncpp_lib as a shared library." OFF)
 OPTION(BUILD_STATIC_LIBS "Build jsoncpp_lib static library." ON)