Merge pull request #1197 from searxng/dependabot/pip/master/redis-4.3.1

Bump redis from 4.2.2 to 4.3.1

requirements.txt

@@ -13,6 +13,6 @@ uvloop==0.16.0
 httpx-socks[asyncio]==0.7.2
 langdetect==1.0.9
 setproctitle==1.2.3
-redis==4.2.2
+redis==4.3.1
 markdown-it-py==2.1.0
 typing_extensions==4.2.0