Chore: Changed the account_type and voucher_type enum.

The account type enum is not stored in the database as an enum.
The voucher_type enum is now a table in the database.

Feature: Closing stock can now be saved and in each department.

brewman/pyproject.toml

@@ -25,6 +25,7 @@ flake8 = "^3.9.2"
 black = "^21.8b0"
 isort = {extras = ["toml"], version = "^5.9.3"}
 pre-commit = "^2.15.0"
+mypy = "^0.910"
 
 [build-system]
 requires = ["poetry-core>=1.0.0"]