Bump pillow from 6.0.0 to 6.2.0

Bumps [pillow](https://github.com/python-pillow/Pillow) from 6.0.0 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@6.0.0...6.2.0)

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

Author: dependabot[bot]

requirements.txt

@@ -17,7 +17,7 @@ mock==2.0.0
 numpy==1.16.2
 opencv-python==3.4.1.15
 pbr==5.1.3
-Pillow==6.0.0
+Pillow==6.2.0
 protobuf==3.7.1
 pyparsing==2.4.0
 PyQt5==5.12.1