requirements: add missing Pillow

Kátia Nakamura · Kátia Nakamura · commit 6a420bf3c9b0 · 2018-04-23T13:20:47.000+02:00
diff --git a/requirements.txt b/requirements.txt
@@ -2,6 +2,7 @@ dj-database-url==0.5.0
 dj-static==0.0.6
 Django==1.11.11
 gunicorn==19.7.1
+Pillow==5.1.0
 psycopg2==2.7.4
 python-decouple==3.1
 pytz==2018.3
