Tests

build(deps-dev): bump mypy from 1.4.1 to 1.6.0 #991

Job	Run time
Lint	1m 19s
Compatibility tests (3.8, sqlite)	2m 46s
Docker tests	3m 59s
Compatibility tests (3.8, postgres)	3m 37s
Compatibility tests (3.8, mysql)	2m 55s
Compatibility tests (3.9, sqlite)	4m 0s
Compatibility tests (3.9, postgres)	4m 10s
Compatibility tests (3.9, mysql)	3m 57s
Compatibility tests (3.10, sqlite)	3m 51s
Compatibility tests (3.10, postgres)	4m 14s
Compatibility tests (3.10, mysql)	3m 45s
	38m 33s

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