CI failures when using TestImages in tests

[jwahlstrand]

Seeing a reproducible 404 error in CI tests for ImageView with Julia 1.11 (but not Julia 1.6). I'm seeing the same error in Gtk4 with both Julia 1.11 and 1.10.

Info: Downloading standard test images
┌ Warning: Base.download is deprecated; use Downloads.download instead
│   caller = (::TestImages.var"#6#7"{String})(artifact_dir::String) at TestImages.jl:121
└ @ TestImages ~/.julia/packages/TestImages/cc9Cr/src/TestImages.jl:121
ERROR: LoadError: RequestError: HTTP/2 404 while requesting https://github.com/JuliaImages/TestImages.jl/blob/gh-pages/images/autumn_leaves.png?raw=true
Stacktrace:
  [1] #3
    @ /opt/hostedtoolcache/julia/1.11.1/x64/share/julia/stdlib/v1.11/Downloads/src/Downloads.jl:271 [inlined]
  [2] open(f::Downloads.var"#3#4"{Nothing, Vector{Pair{String, String}}, Float64, Nothing, Bool, Nothing, Nothing, String}, args::String; kwargs::@Kwargs{write::Bool, lock::Bool})
    @ Base ./io.jl:410
  [3] open_nolock
    @ /opt/hostedtoolcache/julia/1.11.1/x64/share/julia/stdlib/v1.11/ArgTools/src/ArgTools.jl:35 [inlined]
  [4] arg_write(f::Function, arg::String)
    @ ArgTools /opt/hostedtoolcache/julia/1.11.1/x64/share/julia/stdlib/v1.11/ArgTools/src/ArgTools.jl:103
  [5] #download#2
    @ /opt/hostedtoolcache/julia/1.11.1/x64/share/julia/stdlib/v1.11/Downloads/src/Downloads.jl:258 [inlined]
  [6] download(url::String, output::String)
    @ Downloads /opt/hostedtoolcache/julia/1.11.1/x64/share/julia/stdlib/v1.11/Downloads/src/Downloads.jl:247
  [7] #invokelatest#2
    @ ./essentials.jl:1055 [inlined]
  [8] invokelatest
    @ ./essentials.jl:1052 [inlined]
  [9] do_download(url::String, path::String)
    @ Base ./download.jl:24
 [10] download(url::String, path::String)
    @ Base ./download.jl:19
 [11] (::TestImages.var"#6#7"{String})(artifact_dir::String)
    @ TestImages ~/.julia/packages/TestImages/cc9Cr/src/TestImages.jl:121
 [12] create_artifact(f::TestImages.var"#6#7"{String})
    @ Pkg.Artifacts /opt/hostedtoolcache/julia/1.11.1/x64/share/julia/stdlib/v1.11/Pkg/src/Artifacts.jl:39
 [13] image_path(imagename::String)
    @ TestImages ~/.julia/packages/TestImages/cc9Cr/src/TestImages.jl:120
 [14] testimage(filename::String; download_only::Bool, ops::@Kwargs{})
    @ TestImages ~/.julia/packages/TestImages/cc9Cr/src/TestImages.jl:75
 [15] testimage
    @ ~/.julia/packages/TestImages/cc9Cr/src/TestImages.jl:74 [inlined]
 [16] #1
    @ ~/.julia/packages/TestImages/cc9Cr/deps/build.jl:4 [inlined]
 [17] foreach(f::var"#1#2", itr::Vector{String})
    @ Base ./abstractarray.jl:3187
 [18] top-level scope
    @ ~/.julia/packages/TestImages/cc9Cr/deps/build.jl:4
 [19] include(fname::String)
    @ Main ./sysimg.jl:38
 [20] top-level scope
    @ none:5
in expression starting at /home/runner/.julia/packages/TestImages/cc9Cr/deps/build.jl:4
Error: Process completed with exit code 1.

Tests work locally on Julia 1.11.

[jwahlstrand]

Fixed by requiring a recent version of TestImages. This was some sort of compatibility issue involving Gtk4 and the JuliaImages ecosystem.