Update ruby

Changes:

- https://github.com/docker-library/ruby/commit/1d3efcc: Merge pull request https://github.com/docker-library/ruby/pull/337 from infosiftr/alpine3.13
- https://github.com/docker-library/ruby/commit/8ec0fe3: Add alpine:3.13 images; Drop alpine:3.11

library/ruby

@@ -1,4 +1,4 @@
-# this file is generated via https://github.com/docker-library/ruby/blob/f5aa18521c3b73f92ae340d14dc9d24555d02f43/generate-stackbrew-library.sh
+# this file is generated via https://github.com/docker-library/ruby/blob/8ec0fe3a4d9bf9243a2b3247927169c139d5a1a1/generate-stackbrew-library.sh
 
 Maintainers: Tianon Gravi <[email protected]> (@tianon),
              Joseph Ferguson <[email protected]> (@yosifkit)
@@ -14,7 +14,12 @@ Architectures: amd64, arm32v5, arm32v7, arm64v8, i386, mips64le, ppc64le, s390x
 GitCommit: 921f2e68671461785e822aa437b68433278263b9
 Directory: 3.0/buster/slim
 
-Tags: 3.0.0-alpine3.12, 3.0-alpine3.12, 3-alpine3.12, alpine3.12, 3.0.0-alpine, 3.0-alpine, 3-alpine, alpine
+Tags: 3.0.0-alpine3.13, 3.0-alpine3.13, 3-alpine3.13, alpine3.13, 3.0.0-alpine, 3.0-alpine, 3-alpine, alpine
+Architectures: amd64, arm32v6, arm32v7, arm64v8, i386, ppc64le, s390x
+GitCommit: 8ec0fe3a4d9bf9243a2b3247927169c139d5a1a1
+Directory: 3.0/alpine3.13
+
+Tags: 3.0.0-alpine3.12, 3.0-alpine3.12, 3-alpine3.12, alpine3.12
 Architectures: amd64, arm32v6, arm32v7, arm64v8, i386, ppc64le, s390x
 GitCommit: 921f2e68671461785e822aa437b68433278263b9
 Directory: 3.0/alpine3.12
@@ -29,15 +34,15 @@ Architectures: amd64, arm32v5, arm32v7, arm64v8, i386, mips64le, ppc64le, s390x
 GitCommit: 5a4e2d8d9fae6681ac3e2344eac547f0e2cdc598
 Directory: 2.7/buster/slim
 
-Tags: 2.7.2-alpine3.12, 2.7-alpine3.12, 2-alpine3.12, 2.7.2-alpine, 2.7-alpine, 2-alpine
+Tags: 2.7.2-alpine3.13, 2.7-alpine3.13, 2-alpine3.13, 2.7.2-alpine, 2.7-alpine, 2-alpine
 Architectures: amd64, arm32v6, arm32v7, arm64v8, i386, ppc64le, s390x
-GitCommit: 5a4e2d8d9fae6681ac3e2344eac547f0e2cdc598
-Directory: 2.7/alpine3.12
+GitCommit: 8ec0fe3a4d9bf9243a2b3247927169c139d5a1a1
+Directory: 2.7/alpine3.13
 
-Tags: 2.7.2-alpine3.11, 2.7-alpine3.11, 2-alpine3.11
+Tags: 2.7.2-alpine3.12, 2.7-alpine3.12, 2-alpine3.12
 Architectures: amd64, arm32v6, arm32v7, arm64v8, i386, ppc64le, s390x
 GitCommit: 5a4e2d8d9fae6681ac3e2344eac547f0e2cdc598
-Directory: 2.7/alpine3.11
+Directory: 2.7/alpine3.12
 
 Tags: 2.6.6-buster, 2.6-buster, 2.6.6, 2.6
 Architectures: amd64, arm32v5, arm32v7, arm64v8, i386, mips64le, ppc64le, s390x
@@ -59,15 +64,15 @@ Architectures: amd64, arm32v5, arm32v7, arm64v8, i386
 GitCommit: 8e49e25b591d4cfa6324b6dada4f16629a1e51ce
 Directory: 2.6/stretch/slim
 
-Tags: 2.6.6-alpine3.12, 2.6-alpine3.12, 2.6.6-alpine, 2.6-alpine
+Tags: 2.6.6-alpine3.13, 2.6-alpine3.13, 2.6.6-alpine, 2.6-alpine
 Architectures: amd64, arm32v6, arm32v7, arm64v8, i386, ppc64le, s390x
-GitCommit: 8e49e25b591d4cfa6324b6dada4f16629a1e51ce
-Directory: 2.6/alpine3.12
+GitCommit: 8ec0fe3a4d9bf9243a2b3247927169c139d5a1a1
+Directory: 2.6/alpine3.13
 
-Tags: 2.6.6-alpine3.11, 2.6-alpine3.11
+Tags: 2.6.6-alpine3.12, 2.6-alpine3.12
 Architectures: amd64, arm32v6, arm32v7, arm64v8, i386, ppc64le, s390x
 GitCommit: 8e49e25b591d4cfa6324b6dada4f16629a1e51ce
-Directory: 2.6/alpine3.11
+Directory: 2.6/alpine3.12
 
 Tags: 2.5.8-buster, 2.5-buster, 2.5.8, 2.5
 Architectures: amd64, arm32v5, arm32v7, arm64v8, i386, mips64le, ppc64le, s390x
@@ -89,12 +94,12 @@ Architectures: amd64, arm32v5, arm32v7, arm64v8, i386
 GitCommit: 8e49e25b591d4cfa6324b6dada4f16629a1e51ce
 Directory: 2.5/stretch/slim
 
-Tags: 2.5.8-alpine3.12, 2.5-alpine3.12, 2.5.8-alpine, 2.5-alpine
+Tags: 2.5.8-alpine3.13, 2.5-alpine3.13, 2.5.8-alpine, 2.5-alpine
 Architectures: amd64, arm32v6, arm32v7, arm64v8, i386, ppc64le, s390x
-GitCommit: 8e49e25b591d4cfa6324b6dada4f16629a1e51ce
-Directory: 2.5/alpine3.12
+GitCommit: 8ec0fe3a4d9bf9243a2b3247927169c139d5a1a1
+Directory: 2.5/alpine3.13
 
-Tags: 2.5.8-alpine3.11, 2.5-alpine3.11
+Tags: 2.5.8-alpine3.12, 2.5-alpine3.12
 Architectures: amd64, arm32v6, arm32v7, arm64v8, i386, ppc64le, s390x
 GitCommit: 8e49e25b591d4cfa6324b6dada4f16629a1e51ce
-Directory: 2.5/alpine3.11
+Directory: 2.5/alpine3.12