Merge pull request #3 from onlyphantom/dependabot/pip/pillow-8.1.1

Bump pillow from 7.1.0 to 8.1.1

Author: onlyphantom

requirements.txt

@@ -9,7 +9,7 @@ matplotlib==3.1.1
 networkx==2.4     
 numpy==1.17.4  
 opencv-contrib-python==4.1.1.26
-Pillow==7.1.0   
+Pillow==8.1.1   
 pip==19.3.1  
 pyparsing==2.4.5   
 python-dateutil==2.8.1