package/docker-engine: bump version to 19.03.7
Signed-off-by: Christian Stewart <christian@paral.in>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
(cherry picked from commit e505bc4777a61407115fb3fb918f29e62b3caa88)
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>