add test case

- add test case
- update CHANGES.rst

tests/test_basic.py

@@ -2026,3 +2026,11 @@ def test_app_freed_on_zero_refcount():
         assert weak() is None
     finally:
         gc.enable()
+
+
+def test_validate_http_method_route(app, client):
+    
+    with pytest.raises(TypeError):
+        @app.route("/", methods=["BAD_METHOD"])
+        def bad_method_func():
+            return "Hello World"