Update docker

Changes:

- https://github.com/docker-library/docker/commit/f30c3dd: Merge pull request https://github.com/docker-library/docker/pull/329 from infosiftr/19.03
- https://github.com/docker-library/docker/commit/3895de5: Remove 19.03 (no longer supported / maintained)

library/docker

@@ -1,4 +1,4 @@
-# this file is generated via https://github.com/docker-library/docker/blob/5307e54fd0d8778994ae6ae91838ecb6c73d6164/generate-stackbrew-library.sh
+# this file is generated via https://github.com/docker-library/docker/blob/f30c3dd6f0665b2b34e520f9e9348dcaa8755de9/generate-stackbrew-library.sh
 
 Maintainers: Tianon Gravi <[email protected]> (@tianon),
              Joseph Ferguson <[email protected]> (@yosifkit)
@@ -30,23 +30,3 @@ Architectures: windows-amd64
 GitCommit: 83e4de3bc2aac346e2f76129b1a3a556c1e1bb95
 Directory: 20.10/windows/windowsservercore-1809
 Constraints: windowsservercore-1809
-
-Tags: 19.03.15, 19.03, 19, 19.03.15-alpine3.13
-Architectures: amd64, arm64v8
-GitCommit: 835c371c516ebdf67adc0c76bbfb38bf9d3e586c
-Directory: 19.03
-
-Tags: 19.03.15-dind, 19.03-dind, 19-dind, 19.03.15-dind-alpine3.13
-Architectures: amd64, arm64v8
-GitCommit: 8baa881aab85f8398d2edbbcc0da4bd1f556dd98
-Directory: 19.03/dind
-
-Tags: 19.03.15-dind-rootless, 19.03-dind-rootless, 19-dind-rootless
-Architectures: amd64
-GitCommit: 835c371c516ebdf67adc0c76bbfb38bf9d3e586c
-Directory: 19.03/dind-rootless
-
-Tags: 19.03.15-git, 19.03-git, 19-git
-Architectures: amd64, arm64v8
-GitCommit: 12d1c2763b54d29137ec448a3e4ad1a9aefae1a0
-Directory: 19.03/git