Bump pillow from 8.3.1 to 8.3.2 (#824)

dependabot[bot] · web-flow · commit 9f9e2350006d · 2021-09-11T11:30:03.000-05:00
diff --git a/requirements_dev.txt b/requirements_dev.txt
@@ -4,7 +4,7 @@
 #---------------------------------------------------------
 coveralls==3.2.0
 flake8==3.9.2
-pillow==8.3.1
+pillow==8.3.2
 pytest==6.2.5
 pytest-cache==1.0
 pytest-cov==2.12.1
