Merge pull request #1384 from searxng/dependabot/pip/master/black-22.6.0

Bump black from 22.3.0 to 22.6.0

requirements-dev.txt

@@ -1,7 +1,7 @@
 mock==4.0.3
 nose2[coverage_plugin]==0.11.0
 cov-core==1.15.0
-black==22.3.0
+black==22.6.0
 pycodestyle==2.8.0
 pylint==2.14.4
 splinter==0.18.0