fix: replace str with enum value in InMemoryFlag definition (#234)

Signed-off-by: Federico Bond <[email protected]>

Author: federicobond

tests/features/data.py

@@ -65,7 +65,7 @@ def context_func(flag: InMemoryFlag, evaluation_context: EvaluationContext):
         context_evaluator=context_func,
     ),
     "wrong-flag": InMemoryFlag(
-        state="ENABLED",
+        state=InMemoryFlag.State.ENABLED,
         variants={"one": "uno", "two": "dos"},
         default_variant="one",
     ),