Allow notebooks to run under Julia 1.6

[ablaom]

I may misunderstand, but my julia Project.toml file states `julia = ">=1.6, <1.7" but the build process is launching 1.5 and crashing.

Julia 1.6 is already in its third patch release 1.6.3. Also, code loading/compilation in julia 1.6 is way faster.

[welcome[bot]]

Thank you for opening your first issue in this project! Engagement like this is essential for open source projects! :hugs:
If you haven't done so already, check out Jupyter's Code of Conduct. Also, please try to follow the issue template as it helps other other community members to contribute more effectively. You can meet the other Jovyans by joining our Discourse forum. There is also an intro thread there where you can stop by and say Hi! :wave:
Welcome to the Jupyter community! :tada:

[exaexa]

Hello! I'd welcome running julia 1.6 kernels in Binder too. Is there any best way to help it? (I guess I could at least help making the container or something)

[manics]

This needs to be done in https://github.com/jupyterhub/repo2docker which is the tool underlying BinderHub. I'll transfer the issue to that repo.

Julia is handled here: https://github.com/jupyterhub/repo2docker/tree/main/repo2docker/buildpacks/julia

[welcome[bot]]

Thank you for opening your first issue in this project! Engagement like this is essential for open source projects! :hugs:
If you haven't done so already, check out Jupyter's Code of Conduct. Also, please try to follow the issue template as it helps other other community members to contribute more effectively. You can meet the other Jovyans by joining our Discourse forum. There is also an intro thread there where you can stop by and say Hi! :wave:
Welcome to the Jupyter community! :tada:

[exaexa]

Oh nice, thanks.

Actually, I figured that Julia 1.6 is supported (the official clicky example on binder website for julia spawns julia 1.6.2 kernel!), but if I write julia version 1.6 into the .ipynb file, it doesn't open that saying that the kernel does not exist.

Notably, the example specifies julia-1.1 but actually gets Julia 1.6.2.

So perhaps just updating the version numbers somewhere here would fix the whole problem?

[manics]

I'm afraid I don't know enough about Julia. If you or someone else figures out what change is needed please add a test to ensure its not inadvertently broken in future!

[ablaom]

@davidanthoff Any chance you could take a look at this?