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and AUR helpers do not reuse an outdated bearhub-0.10.7.tar.gz from cache.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

@@ -1,50 +0,0 @@
-from abc import ABC, abstractmethod
-from typing import Set, Optional
-
-
-class MemoryCache(ABC):
-    """
-    Represents a memory cache.
-    """
-
-    @abstractmethod
-    def is_enabled(self):
-        pass
-
-    @abstractmethod
-    def add(self, key: str, val: object):
-        pass
-
-    @abstractmethod
-    def add_non_existing(self, key: str, val: object):
-        pass
-
-    @abstractmethod
-    def get(self, key: str):
-        pass
-
-    @abstractmethod
-    def delete(self, key):
-        pass
-
-    @abstractmethod
-    def keys(self) -> Set[str]:
-        pass
-
-    @abstractmethod
-    def clean_expired(self):
-        pass
-
-
-class MemoryCacheFactory(ABC):
-    """
-    Instantiate new memory cache instances.
-    """
-
-    @abstractmethod
-    def new(self, expiration: Optional[int]) -> MemoryCache:
-        """
-        :param expiration: expiration time for the cache keys in seconds. Use -1 to disable this feature.
-        :return:
-        """
-        pass