Fix mypy warnings

src/dbt_score/__main__.py

@@ -18,7 +18,7 @@ def set_logging() -> None:
         handler.setLevel(logging.WARNING)
 
 
-def main():
+def main() -> None:
     """Main entry-point."""
     set_logging()
     cli()

src/dbt_score/config.py

@@ -71,7 +71,7 @@ def load(self) -> None:
         if config_file:
             self._load_toml_file(str(config_file))
 
-    def overload(self, values: dict[str, str]) -> None:
+    def overload(self, values: dict[str, Any]) -> None:
         """Overload config with additional values."""
         for key, value in values.items():
             self.set_option(key, value)

src/dbt_score/rule_catalog.py

@@ -106,7 +106,7 @@ def format_rule(rule: Rule) -> str | None:
         return template
 
 
-def display_catalog(config: Config, title: str, format: str):
+def display_catalog(config: Config, title: str, format: str) -> None:
     """Print rules catalog."""
     formatter: Formatter
     if format == "terminal":