Fix MutableMapping on python 3.10

Author: skybber

udger/base.py

@@ -10,6 +10,11 @@
 from .queries import Queries
 from .wdetector import *
 
+if sys.version_info.major == 3 and sys.version_info.minor >= 10:
+
+    from collections.abc import MutableMapping
+else:
+    from collections import MutableMapping
 
 if sys.version_info.major == 3 and sys.version_info.minor >= 10:
     from collections.abc import MutableMapping
@@ -37,7 +42,7 @@ def __get__(self, instance, unused_type=None):
         return res
 
 
-class LRUDict(collections.MutableMapping):
+class LRUDict(MutableMapping):
     def __init__(self, maxlen, *a, **k):
         self.maxlen = maxlen
         self.d = dict(*a, **k)