refactor(defaults): disallow style as None

Author: Lee-W

commitizen/defaults.py

@@ -47,7 +47,7 @@ class Settings(TypedDict, total=False):
     changelog_merge_prerelease: bool
     update_changelog_on_bump: bool
     use_shortcuts: bool
-    style: list[tuple[str, str]] | None
+    style: list[tuple[str, str]]
     customize: CzSettings
     major_version_zero: bool
     pre_bump_hooks: list[str] | None

tests/test_cz_customize.py

@@ -564,7 +564,7 @@ def test_info_with_info_path(tmpdir, config_info):
 
 def test_info_without_info(config_without_info):
     cz = CustomizeCommitsCz(config_without_info)
-    assert cz.info() is None
+    assert cz.info() == ""
 
 
 def test_commit_parser(config):