Bump compat limit to Julia v1.7+

This is necessary because Julia v1.7+ has important fixes in the `Tar`
standard library.

Require UserNSSandbox_jll that includes overlay mount support

.buildkite/pipeline.yml

@@ -9,7 +9,7 @@ steps:
         elif [[ "$${ARCH}" == "aarch64" ]]; then
           ROOTFS_HASH="dcf39d10ba43bf13c75d5031c3a88f125780033b"
         fi
-        for JULIA_VERSION in 1.6 nightly; do
+        for JULIA_VERSION in 1.7 nightly; do
           for LOCAL_SANDBOX in true false; do
             buildkite-agent pipeline upload .buildkite/test_sandbox.yml
           done

.github/workflows/ci.yml

@@ -15,7 +15,7 @@ jobs:
       fail-fast: false
       matrix:
         julia-version:
-          - "1.6"
+          - "1.7"
           - "1"
           - "nightly"
         julia-arch:
@@ -55,7 +55,7 @@ jobs:
       - uses: actions/checkout@v2
       - uses: julia-actions/setup-julia@v1
         with:
-          version: "^1.6.0-0"
+          version: "^1.7.0-0"
       - name: Cache artifacts
         uses: actions/cache@v2
         env:

Project.toml

@@ -20,8 +20,8 @@ UserNSSandbox_jll = "b88861f7-1d72-59dd-91e7-a8cc876a4984"
 Preferences = "1.2.5"
 Scratch = "1"
 Tar_jll = "1.34.0"
-UserNSSandbox_jll = "2023.3.27"
-julia = "1.6"
+UserNSSandbox_jll = "2023.8.8"
+julia = "1.7"
 
 [extras]
 Downloads = "f43a241f-c20a-4ad4-852c-f6b1247861c6"

contrib/debian-julia-python3/Dockerfile

@@ -1,6 +1,6 @@
 # This is an example of how to create a rootfs image from a Dockerfile
 # Build this with `julia --project contrib/build_docker_images.jl debian-julia-python3`
-ARG JULIA_VERSION=1.6
+ARG JULIA_VERSION=1.7
 FROM julia:${JULIA_VERSION} as julia_container
 
 # Our base image will be debian