Bump certifi from 2020.12.05 to 2021.5.30

Bumps [certifi](https://github.com/certifi/python-certifi) from 2020.12.05 to 2021.5.30.
- [Release notes](https://github.com/certifi/python-certifi/releases)
- [Commits](certifi/python-certifi@2020.12.05...2021.05.30)

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

requirements.txt

@@ -3,6 +3,6 @@ requests==2.25.1
 python-swiftclient==3.11.1
 keystoneauth1==4.3.1
 git+https://github.com/cscfi/swift-browser-ui.git
-certifi==2020.12.05 
+certifi==2021.5.30 
 gunicorn>=20.0.1
 uvloop==0.15.2

setup.py

@@ -19,7 +19,7 @@
         "keystoneauth1==4.3.1",
         "gunicorn>=20.0.1",
         "uvloop==0.15.2",
-        "certifi==2020.12.05",
+        "certifi==2021.5.30",
         "swift-browser-ui" "@ git+https://github.com/cscfi/swift-browser-ui.git",
     ],
     extras_require={