Use json values instead of Python in Airflow variables

src/parsers.py

@@ -1,7 +1,7 @@
 """Abstract and concrete classes to parse DAG configuration from a file."""
 
-import ast
 from dataclasses import dataclass
+import json
 import textwrap
 from typing import List, Set, Tuple
 import yaml
@@ -161,7 +161,7 @@ def _get_terms_params(self, search) -> Tuple[List[str], str, str]:
             if "from_airflow_variable" in terms:
                 var_value = Variable.get(terms.get("from_airflow_variable"))
                 try:
-                    terms = ast.literal_eval(var_value)
+                    terms = json.loads(var_value)
                 except (ValueError, SyntaxError):
                     terms = var_value.splitlines()
             elif "from_db_select" in terms: