message: added SW_MYSQL_TYPE_DOUBLE type.
diff: @@ -266,6 +266,11 @@ static int swoole_mysql_coro_execute(zval *zobject, mysql_client *client, zval *
  mysql_int2store(p, SW_MYSQL_TYPE_VAR_STRING);
  p += 2;
  }
  + else if (Z_TYPE_P(value) == IS_DOUBLE)
  + {
  + mysql_int2store(p, SW_MYSQL_TYPE_DOUBLE);
  + p += 2;
  + }
  else
  {
  swoole_php_fatal_error(E_WARNING, "unknown data type.");
  