Merge pull request #2187 from rogdex24/develop

verify_release: PEP 484 compliant annotations - Issue #2171

Author: jku

verify_release

@@ -16,6 +16,7 @@ import subprocess
 import sys
 from filecmp import cmp
 from tempfile import TemporaryDirectory
+from typing import Optional
 
 try:
     import build as _  # type: ignore
@@ -141,7 +142,7 @@ def verify_pypi_release(version: str, compare_dir: str) -> bool:
 
 
 def sign_release_artifacts(
-    version: str, build_dir: str, key_id: str = None
+    version: str, build_dir: str, key_id: Optional[str] = None
 ) -> None:
     """Sign built release artifacts with gpg and write signature files to cwd"""
     sdist = f"{PYPI_PROJECT}-{version}.tar.gz"