Bump pillow from 6.1.0 to 6.2.0

Bumps [pillow](https://github.com/python-pillow/Pillow) from 6.1.0 to 6.2.0.
- [Release notes](https://github.com/python-pillow/Pillow/releases)
- [Changelog](https://github.com/python-pillow/Pillow/blob/master/CHANGES.rst)
- [Commits](python-pillow/Pillow@6.1.0...6.2.0)

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

Author: dependabot[bot]

requirements.txt

@@ -16,7 +16,7 @@ matplotlib==3.1.1
 numpy==1.17.2
 oauthlib==3.1.0
 pandas==0.25.1
-Pillow==6.1.0
+Pillow==6.2.0
 psycopg2==2.8.3
 pycodestyle==2.5.0
 pyparsing==2.4.2