Ensure support for Python 3.8

'typing.Never' was introduced later, and 'typing.Type' was used instead
of just 'type' until 3.9.  This commit will likely be reverted over time
as these 3.8 etc. get dropped.

beets/dbcore/types.py

@@ -232,7 +232,7 @@ class BaseFloat(Type[float, N]):
     """
 
     sql = "REAL"
-    query: type[FieldQuery[Any]] = NumericQuery
+    query: typing.Type[FieldQuery[Any]] = NumericQuery
     model_type = float
 
     def __init__(self, digits: int = 1):

beets/library.py

@@ -22,8 +22,8 @@ import string
 import sys
 import time
 import unicodedata
-from typing import Never
 from functools import cached_property
+from typing import NoReturn
 
 from mediafile import MediaFile, UnreadableFileError
 
@@ -50,7 +50,7 @@ log = logging.getLogger("beets")
 # Library-specific query types.
 
 
-class SingletonQuery(dbcore.FieldQuery[Never]):
+class SingletonQuery(dbcore.FieldQuery[NoReturn]):
     """This query is responsible for the 'singleton' lookup.
 
     It is based on the FieldQuery and constructs a SQL clause