Add test cases to balanced_parentheses.py (#11870)

* Updated test cases

* Apply suggestion from @cclauss

---------

Co-authored-by: Christian Clauss <cclauss@me.com>

Author: 1227haran

data_structures/stacks/balanced_parentheses.py

@@ -11,6 +11,12 @@ def balanced_parentheses(parentheses: str) -> bool:
     False
     >>> balanced_parentheses("1+2*3-4")
     True
+    >>> balanced_parentheses("{}")
+    True
+    >>> balanced_parentheses("))((")
+    False
+    >>> balanced_parentheses("((")
+    False
     >>> balanced_parentheses("")
     True
     """