Bump requests from 2.7.0 to 2.20.0

Bumps [requests](https://github.com/requests/requests) from 2.7.0 to 2.20.0.
- [Release notes](https://github.com/requests/requests/releases)
- [Changelog](https://github.com/psf/requests/blob/master/HISTORY.md)
- [Commits](psf/requests@v2.7.0...v2.20.0)

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

Author: dependabot[bot]

requirements-dev.txt

@@ -2,6 +2,6 @@ argparse==1.2.1
 beautifulsoup4==4.4.0
 lxml==3.4.4
 nose==1.3.7
-requests==2.7.0
+requests==2.20.0
 wheel==0.24.0
 wsgiref==0.1.2

requirements.txt

@@ -1,5 +1,5 @@
 argparse==1.2.1
 beautifulsoup4==4.4.0
 lxml==3.4.4
-requests==2.7.0
+requests==2.20.0
 wsgiref==0.1.2

setup.py

@@ -17,7 +17,7 @@
     install_requires=[
         "beautifulsoup4==4.4.0",
         "argparse==1.2.1",
-        "requests==2.7.0",
+        "requests==2.20.0",
         "wsgiref==0.1.2",
         "lxml==3.4.4",
     ],