PEP 820: PySlot: Unified slot system for the C API (GH-4754)

Co-authored-by: Sergey B Kirpichev <[email protected]>
Co-authored-by: Adam Turner <[email protected]>

Author: 3 people

.github/CODEOWNERS

@@ -693,6 +693,7 @@ peps/pep-0815.rst  @emmatyping
 peps/pep-0816.rst  @brettcannon
 # ...
 peps/pep-0819.rst  @emmatyping
+peps/pep-0820.rst  @encukou
 # ...
 peps/pep-2026.rst  @hugovk
 # ...