Bump pillow from 6.0.0 to 6.2.0 in /image-segmentation

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] <support@github.com>

Author: dependabot[bot]

image-segmentation/requirements.txt

@@ -7,7 +7,7 @@ networkx==2.3
 nose==1.3.7
 numpy==1.16.2
 opencv-python==4.1.0.25
-Pillow==6.0.0
+Pillow==6.2.0
 pyparsing==2.4.0
 python-dateutil==2.8.0
 PyWavelets==1.0.3