add flake8-encoding plugin

scripts/detect_duplicate_features.py

@@ -42,7 +42,7 @@ def get_features(rule_path: str) -> list:
         list: A list of all feature statements contained within the rule file.
     """
     feature_list = []
-    with open(rule_path, "r") as f:
+    with open(rule_path, "r", encoding="utf-8") as f:
         try:
             new_rule = capa.rules.Rule.from_yaml(f.read())
             feature_list = get_child_features(new_rule.statement)

scripts/setup-linter-dependencies.py

@@ -172,7 +172,7 @@ def main(args: argparse.Namespace) -> None:
 
     logging.info(f"Writing results to {args.output}")
     try:
-        with open(args.output, "w") as jf:
+        with open(args.output, "w", encoding="utf-8") as jf:
             json.dump(data, jf, indent=2)
     except BaseException as e:
         logging.error(f"Exception encountered when writing results: {e}")