Update pillow from 5.2.0 to 5.3.0

pyup-bot · pyup-bot · commit dd546282379a · 2018-10-01T09:35:23.000+01:00
diff --git a/requirements.txt b/requirements.txt
@@ -1,4 +1,4 @@
-pillow==5.2.0  # Image library.
+pillow==5.3.0  # Image library.
 pytz==2018.5
 requests-mock==1.5.2  # Mock `requests`.
 requests==2.19.1
