Compute confidence scores by char, word or line

Closes #33 (closed)

dan/predict/__init__.py

@@ -64,6 +64,8 @@ def add_predict_parser(subcommands) -> None:
     parser.add_argument(
         "--confidence-score-levels",
         default=[],
+        type=str,
+        nargs="+",
         help="Levels of confidence scores. Should be a list of any combinaison of ['char', 'word', 'line'].",
         required=False,
     )