[mod] Wikipedia: fetch engine traits (data_type: supported_languages)

Implements a fetch_traits function for the Wikipedia engines.

.. note::

   Does not include migration of the request methode from 'supported_languages'
   to 'traits' (EngineTraits) object!

Signed-off-by: Markus Heiser <markus.heiser@darmarit.de>

searx/engines/wikidata.py

@@ -16,6 +16,7 @@ from searx.network import post, get
 from searx.utils import match_language, searx_useragent, get_string_replaces_function
 from searx.external_urls import get_external_url, get_earth_coordinates_url, area_to_osm_zoom
 from searx.engines.wikipedia import (  # pylint: disable=unused-import
+    fetch_traits,
     _fetch_supported_languages,
     supported_languages_url,
 )