CI: run tests on flydra_analysis #180

Job	Run time
test-ubuntu-system-python (ubuntu-20.04)	3m 6s
build (ubuntu-20.04, 3.8)	3m 35s
test-ubuntu-system-python (ubuntu-latest)	3m 5s
build (ubuntu-20.04, 3.x)	3m 39s
build (ubuntu-latest, 3.8)	3m 28s
build (ubuntu-latest, 3.x)	3m 8s
build (macos-11, 3.8)	4m 27s
build (macos-11, 3.x)	4m 50s
build (macos-latest, 3.8)	5m 39s
build (macos-latest, 3.x)	5m 20s
build (windows-2019, 3.8)	5m 31s
build (windows-2019, 3.x)	6m 26s
build (windows-latest, 3.8)	5m 34s
build (windows-latest, 3.x)	6m 50s
	1h 4m 38s

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