Merge pull request #46 from pmaji/paul_dev

fix security vulnerability in pillow

Author: pmaji

requirements.txt

@@ -44,7 +44,7 @@ parso==0.5.1
 patsy==0.5.1
 pexpect==4.7.0
 pickleshare==0.7.5
-Pillow==6.2.0
+Pillow>=6.2.2
 plotly==4.0.0
 plotly-express==0.4.0
 plotnine==0.5.1