Prepare v1.4.0

CHANGELOG

+v1.4.0 2020-01-12
+-----------------
+Add version to the images again
+docker/l3d#4 Set permissions after "drush generate"
+docker/l3d#39 Update to git-extras version 5.1.0 by hard-copying column as a binary
+docker/l3d#34 Add support for PHP 7.3
+docker/l3d#36 Add apropos which also brings man
+docker/l3d#37 Add phpstan script which runs in its own docker container
+docker/l3d#38 Update Docker to 19.03.5
+docker/l3d#38 Update Docker Compose to 1.25.1
+docker/l3d#40 Update to Python 3 No longer update image for PHP 7.0 and 7.1