Made cache_dir argument with CACHE_DIR as default

tibi_hardlinks/cache.py

@@ -7,10 +7,10 @@ from tibi_hardlinks.config import CACHE_DIR
 
 
 class Cache:
-    def __init__(self):
+    def __init__(self, cache_dir=CACHE_DIR):
         self._store = None
-        self.filepath = Path(CACHE_DIR) / "cache.pkl.lzma"
-        atexit.register(self.save)
+        self.filepath = Path(cache_dir) / "cache.pkl.lzma"
+        atexit.register(self.store)
 
     def read(self, key):
         if self.store is None: