⬆️ Update dependency mypy to v1.4.0 (#16)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

poetry.lock

@@ -37,7 +37,7 @@ blacken-docs = "1.14.0"
 codespell = "2.2.5"
 covdefaults = "2.3.0"
 coverage = {version = "7.2.7", extras = ["toml"]}
-mypy = "1.3.0"
+mypy = "1.4.0"
 pre-commit = "3.3.3"
 pre-commit-hooks = "4.4.0"
 pylint = "2.17.4"