tests/basics: Add tests for equality between bool and int/float/complex.

False/True should be implicitly converted to 0/1 when compared with numeric
types.

tests/basics/set_add.py

@@ -1,3 +1,23 @@
 s = {1, 2, 3, 4}
 print(s.add(5))
 print(sorted(s))
+
+s = set()
+s.add(0)
+s.add(False)
+print(s)
+
+s = set()
+s.add(False)
+s.add(0)
+print(s)
+
+s = set()
+s.add(1)
+s.add(True)
+print(s)
+
+s = set()
+s.add(True)
+s.add(1)
+print(s)