chore: fix enum

enums.py

@@ -1,13 +1,10 @@
 from enum import Enum
 
 
-class GitHubActionsInput(Enum):
+class GitHubActionsInput(str, Enum):
     DATA_FILE = 'INPUT_DATA_FILE'
-    TEMPLATE = 'INPUT_TEMPLATE'
-    STRICT = 'INPUT_STRICT'
+    DATA_FORMAT = 'INPUT_DATA_FORMAT'
     OUTPUT_FILE = 'INPUT_OUTPUT_FILE'
+    STRICT = 'INPUT_STRICT'
+    TEMPLATE = 'INPUT_TEMPLATE'
     VARIABLES = 'INPUT_VARIABLES'
-
-    def __str__(self, *args, **kwargs):
-        return str(self.value)
-

unit-tests.py

@@ -1,3 +1,7 @@
 import unittest
 
-# TODO: Tests.
+class TestContext(unittest.TestCase):
+    pass
+
+if __name__ == '__main__':
+    unittest.main()