tests

Build our wheels against FFmpeg 6.0 #937

Job	Run time
package-source	30s
style	19s
package-wheel (macos-latest, arm64)	24m 1s
py-3.8 lib-6.0 ubuntu-latest	6m 54s
package-wheel (macos-latest, x86_64)	30m 12s
py-3.8 lib-5.1 ubuntu-latest	6m 10s
py-3.8 lib-6.0 windows-latest	4m 1s
package-wheel (ubuntu-latest, aarch64)	3h 20m 36s
py-3.8 lib-5.0 ubuntu-latest	7m 3s
py-3.8 lib-5.1 windows-latest	4m 28s
package-wheel (ubuntu-latest, i686)	29m 31s
py-pypy3.9 lib-5.0 ubuntu-latest	7m 14s
py-3.8 lib-5.0 windows-latest	4m 22s
package-wheel (ubuntu-latest, x86_64)	37m 4s
py-3.8 lib-5.0 macos-latest	9m 18s
package-wheel (windows-latest, AMD64)	29m 9s
publish	51s
	6h 41m 43s

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