Upgrade from pylint v2.8.3 to 2.9.3 raise some new issues::
searx/search/checker/__main__.py:37:26: R1732: Consider using 'with' for resource-allocating operations (consider-using-with)
searx/search/checker/__main__.py:38:26: R1732: Consider using 'with' for resource-allocating operations (consider-using-with)
searx/search/processors/__init__.py:20:0: R0402: Use 'from searx import engines' instead (consider-using-from-import)
searx/preferences.py:182:19: C0207: Use data.split('-', maxsplit=1)[0] instead (use-maxsplit-arg)
searx/preferences.py:506:15: R1733: Unnecessary dictionary index lookup, use 'user_setting' instead (unnecessary-dict-index-lookup)
searx/webapp.py:436:0: C0206: Consider iterating with .items() (consider-using-dict-items)
searx/webapp.py:950:4: C0206: Consider iterating with .items() (consider-using-dict-items)
Signed-off-by: Markus Heiser <markus.heiser@darmarit.de>