Bump gunicorn version

cmatthew · cmatthew · commit 60fdaa9b7f2d · 2021-09-13T10:39:57.000-07:00
I have been using 19.9 on our servers for many months,
it works great and has statsd support.
diff --git a/requirements.server.txt b/requirements.server.txt
@@ -1,5 +1,5 @@
 # These requirements are what you would install on a production server.
 .
 psycopg2==2.8
-gunicorn==18.0
+gunicorn==19.9.0
 progressbar2

Original file line number	Diff line number	Diff line change
`@@ -1,5 +1,5 @@`
`1`	`1`	`# These requirements are what you would install on a production server.`
`2`	`2`	`.`
`3`	`3`	`psycopg2==2.8`
`4`		`-gunicorn==18.0`
	`4`	`+gunicorn==19.9.0`
`5`	`5`	`progressbar2`