test(release): support Python 3.10 configuration checks

Author: bokelley

tests/test_release_configuration.py

@@ -3,17 +3,22 @@
 from __future__ import annotations
 
 import json
+import re
 from pathlib import Path
 
-import tomllib
-
 ROOT = Path(__file__).parent.parent
 
 
 def test_worktree_version_matches_last_release_manifest() -> None:
-    project = tomllib.loads((ROOT / "pyproject.toml").read_text())
+    pyproject = (ROOT / "pyproject.toml").read_text()
+    project_section = re.search(
+        r'^\[project\]\s*$.*?^version\s*=\s*"([^"]+)"',
+        pyproject,
+        flags=re.MULTILINE | re.DOTALL,
+    )
+    assert project_section is not None
     manifest = json.loads((ROOT / ".release-please-manifest.json").read_text())
-    assert project["project"]["version"] == manifest["."]
+    assert project_section.group(1) == manifest["."]
 
 
 def test_release_please_targets_v7_rc_from_breaking_commit() -> None: