Bump mypy from 1.8.0 to 1.9.0 #306

Job	Run time
Mypy (static type checker)	15s
Build documentation	30s
Documentation link check	34s
Linters	47s
Packaging	22s
Py:3.8 - Tw:21.2 - ubuntu-latest	57s
Py:3.8 - Tw:22.1 - ubuntu-latest	45s
Py:3.8 - Tw:23.10 - ubuntu-latest	53s
Py:3.9 - Tw:21.2 - ubuntu-latest	50s
Py:3.9 - Tw:22.1 - ubuntu-latest	51s
Py:3.9 - Tw:23.10 - ubuntu-latest	54s
Py:3.10 - Tw:21.2 - ubuntu-latest	46s
Py:3.10 - Tw:22.1 - ubuntu-latest	56s
Py:3.10 - Tw:23.10 - ubuntu-latest	58s
Py:3.11 - Tw:21.2 - ubuntu-latest	45s
Py:3.11 - Tw:22.1 - ubuntu-latest	47s
Py:3.11 - Tw:23.10 - ubuntu-latest	49s
Py:3.12 - Tw:21.2 - ubuntu-latest	1m 20s
Py:3.12 - Tw:22.1 - ubuntu-latest	1m 23s
Py:3.12 - Tw:23.10 - ubuntu-latest	1m 17s
Py:pypy-3.8 - Tw:current - ubuntu-latest	26s
Py:pypy-3.9 - Tw:current - ubuntu-latest	1m 29s
-postgresPy:3.12 - Tw:23.10 - ubuntu-latest	1m 36s
-mysqlPy:3.12 - Tw:23.10 - ubuntu-latest	1m 51s
dbxs-required	1s
	22m 2s

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