Update docker

Changes:

- https://github.com/docker-library/docker/commit/30147db: Update to 18.09.7-rc1
- https://github.com/docker-library/docker/commit/e2e4d74: Update to 19.03.0-rc3

library/docker

@@ -4,21 +4,36 @@ Maintainers: Tianon Gravi <[email protected]> (@tianon),
              Joseph Ferguson <[email protected]> (@yosifkit)
 GitRepo: https://github.com/docker-library/docker.git
 
-Tags: 19.03.0-rc2, 19.03-rc, rc, test
+Tags: 19.03.0-rc3, 19.03-rc, rc, test
 Architectures: amd64, arm32v6, arm32v7, arm64v8
-GitCommit: 6001c15038b05149a83dcc17e1bbeedc92979f6d
+GitCommit: e2e4d748617160f82dd4a98e5a643f4453152d95
 Directory: 19.03-rc
 
-Tags: 19.03.0-rc2-dind, 19.03-rc-dind, rc-dind, test-dind
+Tags: 19.03.0-rc3-dind, 19.03-rc-dind, rc-dind, test-dind
 Architectures: amd64, arm32v6, arm32v7, arm64v8
 GitCommit: 27471a8b93e980bd4c51464ee933ed90fd36bf97
 Directory: 19.03-rc/dind
 
-Tags: 19.03.0-rc2-git, 19.03-rc-git, rc-git, test-git
+Tags: 19.03.0-rc3-git, 19.03-rc-git, rc-git, test-git
 Architectures: amd64, arm32v6, arm32v7, arm64v8
 GitCommit: 98ffef81ebfa7601a9ed2f0bf56d78f426bf253c
 Directory: 19.03-rc/git
 
+Tags: 18.09.7-rc1, 18.09-rc
+Architectures: amd64, arm32v6, arm32v7, arm64v8
+GitCommit: 30147db7aaadbc1017c30e6a03761e83bf71c6e7
+Directory: 18.09-rc
+
+Tags: 18.09.7-rc1-dind, 18.09-rc-dind
+Architectures: amd64, arm32v6, arm32v7, arm64v8
+GitCommit: 27471a8b93e980bd4c51464ee933ed90fd36bf97
+Directory: 18.09-rc/dind
+
+Tags: 18.09.7-rc1-git, 18.09-rc-git
+Architectures: amd64, arm32v6, arm32v7, arm64v8
+GitCommit: 341e19641e58cccff1453653425fc56c07e8944d
+Directory: 18.09-rc/git
+
 Tags: 18.09.6, 18.09, 18, stable, latest
 Architectures: amd64, arm32v6, arm32v7, arm64v8
 GitCommit: 6001c15038b05149a83dcc17e1bbeedc92979f6d