Merge pull request #394 from searxng/dependabot/pip/master/flask-2.0.2

Bump flask from 2.0.1 to 2.0.2

requirements.txt

@@ -1,7 +1,7 @@
 certifi==2021.5.30
 babel==2.9.1
 flask-babel==2.0.0
-flask==2.0.1
+flask==2.0.2
 jinja2==3.0.2
 lxml==4.6.3
 pygments==2.10.0