Bump pylint from 2.7.4 to 2.8.2

Bumps [pylint](https://github.com/PyCQA/pylint) from 2.7.4 to 2.8.2.
- [Release notes](https://github.com/PyCQA/pylint/releases)
- [Changelog](https://github.com/PyCQA/pylint/blob/master/ChangeLog)
- [Commits](https://github.com/PyCQA/pylint/compare/pylint-2.7.4...v2.8.2)

Signed-off-by: dependabot[bot] <support@github.com>

searx/testing.py

@@ -61,7 +61,7 @@ class SearxRobotLayer():
             dirname(__file__) + '/settings_robot.yml')
 
         # run the server
-        self.server = subprocess.Popen(
+        self.server = subprocess.Popen(  # pylint: disable=consider-using-with
             [exe, webapp],
             stdout=subprocess.PIPE,
             stderr=subprocess.STDOUT