Fix for #404

Author: willmmiles

src/AsyncJson.cpp

@@ -112,7 +112,7 @@ size_t AsyncMessagePackResponse::_fillBuffer(uint8_t *data, size_t len) {
 #endif
 
 // Body handler supporting both content types: JSON and MessagePack
-constexpr static bool JsonHandlerMethods =
+constexpr static WebRequestMethodComposite JsonHandlerMethods =
   AsyncWebRequestMethod::HTTP_GET | AsyncWebRequestMethod::HTTP_POST | AsyncWebRequestMethod::HTTP_PUT | AsyncWebRequestMethod::HTTP_PATCH;
 
 #if ARDUINOJSON_VERSION_MAJOR == 6