Update deprecated collections imports

.gitignore

@@ -12,4 +12,4 @@ README.html
 *multidata
 *multisave
 EnemizerCLI/
-.mypy_cache/
+.mypy_cache/

_vendor/collections_extended/bags.py

@@ -1,7 +1,7 @@
 """Bag class definitions."""
 import heapq
 from operator import itemgetter
-from collections import Set, MutableSet, Hashable
+from collections.abc import Set, MutableSet, Hashable
 
 from . import _compat
 

_vendor/collections_extended/bijection.py

@@ -1,6 +1,6 @@
 """Class definition for bijection."""
 
-from collections import MutableMapping, Mapping
+from collections.abc import MutableMapping, Mapping
 
 
 class bijection(MutableMapping):

_vendor/collections_extended/range_map.py

@@ -1,6 +1,7 @@
 """RangeMap class definition."""
 from bisect import bisect_left, bisect_right
-from collections import namedtuple, Mapping, MappingView, Set
+from collections import namedtuple
+from collections.abc import Mapping, MappingView, Set
 
 
 # Used to mark unmapped ranges

_vendor/collections_extended/setlists.py

@@ -1,7 +1,7 @@
 """Setlist class definitions."""
 import random as random_
 
-from collections import (
+from collections.abc import (
 	Sequence,
 	Set,
 	MutableSequence,