Test

Bump version: v2.20.0 #555

Job	Run time
Linters (mypy, flake8, etc.)	56s
Get qemu emulated architectures	9s
Test cibuildwheel building pyodide wheels	6m 37s
Test on ubuntu-latest (3.12)	39m 5s
Test on windows-latest (3.12)	40m 8s
Test on macos-13 (3.12)	20m 44s
Test on macos-14 (3.12)	11m 42s
Test on ubuntu-latest (3.8)	40m 7s
Test Linux aarch64 using qemu	26m 18s
Test Linux ppc64le using qemu	17m 19s
Test Linux s390x using qemu	18m 52s
	3h 41m 57s

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