ZMQ jll for Apple Silicon platform needed

[domschl]

In order to use jupyter, a prebuilt version of ZMQ jll for :aarch64 (apple silicon) is needed.
Patching ZMQ.jl to use a system arm64 version of zeromq install via brew works fine.

[giordano]

Fixed by JuliaPackaging/Yggdrasil#3194. I confirm ZMQ.jl passes tests with ZeroMQ_jll v4.3.4, but the IJulia kernel doesn't start for me in a Jupyter notebook.

[stevengj]

Closed as fixed upstream. If there are other problems with IJulia on m1, that should be a separate issue.

[domschl]

Confirmed it works now, thank you.

Two comments:

• I somehow did not automatically receive the new version of ZeroMQ_jll, I had to deinstall ZeroMQ_jll and ZMQ and at some point a new version was installed and it worked.
• There seems to be an incompatibility with the Jupyter kernel of IJulia: removing the old kernel and rebuilding IJulia fixed this, so IJulia is now working too without any patches on M1 with julia master.