AUR bearhub: fix stale source cache collision (pkgrel=10)

Use tag-specific tarball name bearhub-0.10.7-bearhub.6.tar.gz so makepkg
and AUR helpers do not reuse an outdated bearhub-0.10.7.tar.gz from cache.
Ignore makepkg artifacts under packaging/aur/.

bauh/api/user.py

@@ -1,6 +0,0 @@
-import os
-from typing import Optional
-
-
-def is_root(user_id: Optional[int] = None):
-    return user_id == 0 if user_id is not None else os.getuid() == 0