Merge pull request #6 from jesuscast/bugfix/pep585-backwards-compatibility-python-3.7

Make PEP585 type annotations backwards compatible with Python 3.7+

Author: nsnguyen

src/dotenv_vault/main.py

@@ -1,3 +1,5 @@
+from __future__ import annotations
+
 import os
 import logging
 from typing import (IO, Optional,Union)

src/dotenv_vault/vault.py

@@ -1,3 +1,5 @@
+from __future__ import annotations
+
 import os
 import io