update to 1.7.19

Author: pascalandy

traefik_stack5/stack-proxy.yml

@@ -57,7 +57,7 @@ services:
  # and capture client IP's
  traefik:
  <<: *default-opts
- image: traefik:1.7.18
+ image: traefik:1.7.19
  ports:
  - target: 80
  protocol: tcp