Update julia

Changes:

- https://github.com/docker-library/julia/commit/54c776a: Merge pull request https://github.com/docker-library/julia/pull/50 from infosiftr/1.6.0-beta1
- https://github.com/docker-library/julia/commit/fff19ae: Add 1.6.0-beta1

library/julia

@@ -1,9 +1,29 @@
-# this file is generated via https://github.com/docker-library/julia/blob/1b5419f202a882cd7acf6ea1d43cab37c7b7e983/generate-stackbrew-library.sh
+# this file is generated via https://github.com/docker-library/julia/blob/fff19aebd036897d380cd48ba5be847d04e09ec6/generate-stackbrew-library.sh
 
 Maintainers: Tianon Gravi <[email protected]> (@tianon),
              Joseph Ferguson <[email protected]> (@yosifkit)
 GitRepo: https://github.com/docker-library/julia.git
 
+Tags: 1.6.0-beta1-buster, 1.6.0-buster, 1.6-buster, 1.6-rc-buster
+SharedTags: 1.6.0-beta1, 1.6.0, 1.6, 1.6-rc
+Architectures: amd64, arm64v8, i386, ppc64le
+GitCommit: fff19aebd036897d380cd48ba5be847d04e09ec6
+Directory: 1.6-rc/buster
+
+Tags: 1.6.0-beta1-windowsservercore-1809, 1.6.0-windowsservercore-1809, 1.6-windowsservercore-1809, 1.6-rc-windowsservercore-1809
+SharedTags: 1.6.0-beta1, 1.6.0, 1.6, 1.6-rc
+Architectures: windows-amd64
+GitCommit: fff19aebd036897d380cd48ba5be847d04e09ec6
+Directory: 1.6-rc/windows/windowsservercore-1809
+Constraints: windowsservercore-1809
+
+Tags: 1.6.0-beta1-windowsservercore-ltsc2016, 1.6.0-windowsservercore-ltsc2016, 1.6-windowsservercore-ltsc2016, 1.6-rc-windowsservercore-ltsc2016
+SharedTags: 1.6.0-beta1, 1.6.0, 1.6, 1.6-rc
+Architectures: windows-amd64
+GitCommit: fff19aebd036897d380cd48ba5be847d04e09ec6
+Directory: 1.6-rc/windows/windowsservercore-ltsc2016
+Constraints: windowsservercore-ltsc2016
+
 Tags: 1.5.3-buster, 1.5-buster, 1-buster, buster
 SharedTags: 1.5.3, 1.5, 1, latest
 Architectures: amd64, arm64v8, i386