Actually show deprecation warnings

Author: khaledhosny

src/uharfbuzz/_harfbuzz.pyx

@@ -46,7 +46,7 @@ def deprecated(replacement=None):
             if replacement:
                 message += f", use {replacement} instead"
             if message not in WARNED:
-                warnings.warn(message, DeprecationWarning, stacklevel=2)
+                warnings.warn(message, DeprecationWarning)
                 WARNED.add(message)
             return func(*args, **kwargs)
 

tests/test_uharfbuzz.py

@@ -1811,3 +1811,8 @@ def test_subset(blankfont):
             assert len(reverse) == 5
             cmap = plan.unicode_to_old_glyph_mapping
             assert cmap[ord("b")] == 2
+
+
+def test_deprecated():
+    with pytest.deprecated_call():
+        hb.ot_color_glyph_get_layers(hb.Face(), 0)