Bump pillow from 6.0.0 to 6.2.0 in /python3.7 (#98)

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]

python3.7/requirements.txt

@@ -24,7 +24,7 @@ scipy == 1.2.1
 pandas == 0.24.2
 
 # packages for image processing
-Pillow == 6.0.0
+Pillow == 6.2.0
 
 # IBM specific python modules
 ibm_db == 3.0.1