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and AUR helpers do not reuse an outdated bearhub-0.10.7.tar.gz from cache.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/gems/arch/exceptions.py

@@ -1,13 +0,0 @@
-from typing import Optional
-
-
-class PackageNotFoundException(Exception):
-
-    def __init__(self, name: str):
-        self.name = name
-
-
-class PackageInHoldException(Exception):
-
-    def __init__(self, name: Optional[str] = None):
-        self.name = name