chore: mypyの設定をpyproject.tomlに移動 (#1604)

Author: nanae772

mypy.ini

@@ -15,6 +15,13 @@ unfixable = [
 known-first-party = ["voicevox_engine"]
 known-third-party = ["numpy"]
 
+[tool.mypy]
+strict = true
+plugins = "numpy.typing.mypy_plugin,pydantic.mypy"
+python_version = "3.11"
+ignore_missing_imports = true
+warn_unreachable = true
+
 [tool.typos.default.extend-words]
 datas = "datas" # PyInstaller's argument