message: Fix convert to int for inapp message json (lib)
diff: @@ -1530,8 +1530,8 @@ error Context::fetchMessage() {
  return error("Error parsing update check response body");
  }
  auto messageID = root["id"].asInt64();
  - auto type = root["type"].asInt64();
  - auto days = root["days"].asInt64();
  + auto type = stoi(root["type"].asString());
  + auto days = stoi(root["days"].asString());
  version_number = root["appversion"].asString();
  