Update julia

Changes:

- https://github.com/docker-library/julia/commit/acbc6be: Merge pull request https://github.com/docker-library/julia/pull/36 from infosiftr/stretch-goals
- https://github.com/docker-library/julia/commit/db1a7e6: Add stretch variants of 1.2 and 1.3-rc

library/julia

@@ -10,6 +10,11 @@ Architectures: amd64, arm32v7, arm64v8, i386
 GitCommit: a3b407f5c987e24d0135b6c8678657f57a5380ff
 Directory: 1.3-rc/buster
 
+Tags: 1.3.0-rc2-stretch, 1.3.0-stretch, 1.3-stretch, 1.3-rc-stretch
+Architectures: amd64, arm32v7, arm64v8, i386
+GitCommit: db1a7e6fad976b52043021c7c4716dba6a2ab03b
+Directory: 1.3-rc/stretch
+
 Tags: 1.3.0-rc2-windowsservercore-ltsc2016, 1.3.0-windowsservercore-ltsc2016, 1.3-windowsservercore-ltsc2016, 1.3-rc-windowsservercore-ltsc2016
 SharedTags: 1.3.0-rc2, 1.3.0, 1.3, 1.3-rc
 Architectures: windows-amd64
@@ -30,6 +35,11 @@ Architectures: amd64, arm32v7, arm64v8, i386
 GitCommit: 5f637f20522f82f953c69318002820da70d2e3f9
 Directory: 1.2/buster
 
+Tags: 1.2.0-stretch, 1.2-stretch, 1-stretch, stretch
+Architectures: amd64, arm32v7, arm64v8, i386
+GitCommit: db1a7e6fad976b52043021c7c4716dba6a2ab03b
+Directory: 1.2/stretch
+
 Tags: 1.2.0-windowsservercore-ltsc2016, 1.2-windowsservercore-ltsc2016, 1-windowsservercore-ltsc2016, windowsservercore-ltsc2016
 SharedTags: 1.2.0, 1.2, 1, latest
 Architectures: windows-amd64