tests

Add missing stub in av.filter #1114

Job	Run time
style	20s
package-source	22s
py-3.8 lib-6.1 windows-latest	3m 13s
py-3.8 lib-6.1 ubuntu-latest	5m 16s
py-3.8 lib-6.0 windows-latest	3m 25s
py-3.8 lib-6.0 ubuntu-latest	4m 15s
py-3.8 lib-5.1 windows-latest	3m 29s
py-3.8 lib-5.1 ubuntu-latest	4m 9s
py-3.8 lib-5.0 windows-latest	3m 28s
package-wheel (macos-latest, arm64)	14m 56s
package-wheel (macos-latest, x86_64)	30m 32s
package-wheel (ubuntu-latest, aarch64)	3h 28m 4s
package-wheel (ubuntu-latest, i686)	24m 39s
py-3.8 lib-5.0 ubuntu-latest	4m 19s
package-wheel (ubuntu-latest, x86_64)	21m 18s
py-pypy3.9 lib-6.1 ubuntu-latest	4m 12s
py-3.8 lib-6.1 macos-latest	11m 17s
package-wheel (windows-latest, AMD64)	15m 40s
publish	39s
	6h 3m 33s

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