Upgrade CI to Docker 19.03.13

Closes gh-23469

Author: wilkinsona

ci/images/get-docker-url.sh

@@ -1,5 +1,5 @@
 #!/bin/bash
 set -e
 
-version="19.03.12"
+version="19.03.13"
 echo "https://download.docker.com/linux/static/stable/x86_64/docker-$version.tgz";