CI check, changed to Py_True

Author: Kishan-Ved

pydatastructs/trees/tests/test_binary_trees.py

@@ -70,10 +70,10 @@ def _test_BinarySearchTree(backend):
     b.insert(-14, 14)
     b.insert(-13, 13)
 
-    b.delete(-13)
-    b.delete(-10)
-    b.delete(-3)
-    b.delete(-13)
+    assert b.delete(-13) is True
+    assert b.delete(-10) is True
+    assert b.delete(-3) is True
+    assert b.delete(-13) is None
 
     bl = BST(backend=backend)
     nodes = [50, 30, 90, 70, 100, 60, 80, 55, 20, 40, 15, 10, 16, 17, 18]