Update julia

Changes:

- https://github.com/docker-library/julia/commit/279b072: Merge pull request https://github.com/docker-library/julia/pull/52 from J0WI/alpine-3.13
- https://github.com/docker-library/julia/commit/3637fcd: Alpine 3.13

library/julia

@@ -1,4 +1,4 @@
-# this file is generated via https://github.com/docker-library/julia/blob/fff19aebd036897d380cd48ba5be847d04e09ec6/generate-stackbrew-library.sh
+# this file is generated via https://github.com/docker-library/julia/blob/3637fcd50d99c6be64cb1f56d870ac3b3e3fac69/generate-stackbrew-library.sh
 
 Maintainers: Tianon Gravi <[email protected]> (@tianon),
              Joseph Ferguson <[email protected]> (@yosifkit)
@@ -30,7 +30,12 @@ Architectures: amd64, arm64v8, i386
 GitCommit: 1a43a633f80d76bd6bf20b88797b18971b87de4e
 Directory: 1.5/buster
 
-Tags: 1.5.3-alpine3.12, 1.5-alpine3.12, 1-alpine3.12, alpine3.12, 1.5.3-alpine, 1.5-alpine, 1-alpine, alpine
+Tags: 1.5.3-alpine3.13, 1.5-alpine3.13, 1-alpine3.13, alpine3.13, 1.5.3-alpine, 1.5-alpine, 1-alpine, alpine
+Architectures: amd64
+GitCommit: 3637fcd50d99c6be64cb1f56d870ac3b3e3fac69
+Directory: 1.5/alpine3.13
+
+Tags: 1.5.3-alpine3.12, 1.5-alpine3.12, 1-alpine3.12, alpine3.12
 Architectures: amd64
 GitCommit: 221740e8163a4bdb858065b5cca1ae774ea3a73a
 Directory: 1.5/alpine3.12