Add version macros for RapidJSON

test/unittest/unittest.cpp

@@ -13,10 +13,13 @@
 // specific language governing permissions and limitations under the License.
 
 #include "unittest.h"
+#include "rapidjson/rapidjson.h"
 
 int main(int argc, char **argv) {
     ::testing::InitGoogleTest(&argc, argv);
 
+    std::cout << "RapidJSON v" << RAPIDJSON_VERSION_STRING << std::endl;
+
 #if _MSC_VER
     _CrtMemState memoryState = { 0 };
     _CrtMemCheckpoint(&memoryState);