Merge pull request #2156 from searxng/dependabot/pip/master/splinter-0.19.0

Bump splinter from 0.18.1 to 0.19.0

requirements-dev.txt

@@ -3,7 +3,7 @@ nose2[coverage_plugin]==0.12.0
 cov-core==1.15.0
 black==22.12.0
 pylint==2.15.10
-splinter==0.18.1
+splinter==0.19.0
 selenium==4.7.2
 twine==4.0.2
 Pallets-Sphinx-Themes==2.0.3