Bump gunicorn in /project/ehmatthes-pcc-f555082/chapter_20

Bumps [gunicorn](https://github.com/benoitc/gunicorn) from 19.3.0 to 19.5.0.
- [Release notes](https://github.com/benoitc/gunicorn/releases)
- [Commits](benoitc/gunicorn@19.3...19.5.0)

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

project/ehmatthes-pcc-f555082/chapter_20/learning_log_django_2.1/requirements.txt

@@ -2,7 +2,7 @@ dj-database-url==0.5.0
 dj-static==0.0.6
 Django==2.2.18
 django-bootstrap3==10.0.1
-gunicorn==19.9.0
+gunicorn==19.5.0
 psycopg2==2.7.5
 pytz==2018.5
 static3==0.7.0

project/ehmatthes-pcc-f555082/chapter_20/requirements.txt

@@ -2,6 +2,6 @@ Django==1.11.29
 dj-database-url==0.3.0
 dj-static==0.0.6
 django-bootstrap3==6.2.2
-gunicorn==19.3.0
+gunicorn==19.5.0
 static3==0.6.1
 psycopg2>=2.6.1