Add enough types to pass mypy #296

Job	Run time
docs	44s
docs	31s
ci / Build	8m 8s
ci / Build	9m 4s
macos / Test macOS	36s
macos / Test macOS	19s
windows / Test Windows	51s
windows / Test Windows	46s
ci / Test (0)	1m 48s
ci / Test (0)	9m 24s
ci / Lint	1m 46s
ci / Lint	1m 49s
ci / Test (1)	1m 57s
ci / Test (1)	12m 11s
ci / Test (2)	2m 13s
ci / Test (2)	19m 58s
ci / Test (3)	1m 41s
ci / Test (3)	8m 54s
ci / Test (4)	1m 42s
ci / Test (4)	13m 9s
ci / Test (5)	2m 0s
ci / Test (5)	8m 15s
ci / Test (6)	3m 23s
ci / Test (6)	8m 23s
ci / Test (7)	3m 4s
ci / Test (7)	10m 55s
ci / Test (8)	1m 44s
ci / Test (8)	9m 20s
ci / Test (9)	1m 47s
ci / Test (9)	8m 7s
ci / Publish Unit Tests Results	1s
ci / Publish Unit Tests Results	1s
	2h 34m 31s

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