Use real type instead of typing alias for annotations

These have been deprecated since Python 3.9, but are usable on 3.8 with
when using `from __future__ import annotations`, as these annotations
are not evaluated at runtime.

piptools/resolver.py

@@ -5,7 +5,7 @@
 from abc import ABCMeta, abstractmethod
 from functools import partial
 from itertools import chain, count, groupby
-from typing import Any, Container, DefaultDict, Iterable, Iterator
+from typing import Any, Container, Iterable, Iterator
 
 import click
 from pip._internal.exceptions import DistributionNotFound
@@ -532,7 +532,7 @@ def __init__(
         self.existing_constraints = existing_constraints
 
         # Categorize InstallRequirements into sets by key
-        constraints_sets: DefaultDict[str, set[InstallRequirement]] = (
+        constraints_sets: collections.defaultdict[str, set[InstallRequirement]] = (
             collections.defaultdict(set)
         )
         for ireq in constraints:
@@ -746,7 +746,9 @@ def _get_install_requirements(
     def _get_reverse_dependencies(
         resolver_result: Result,
     ) -> dict[str, set[str]]:
-        reverse_dependencies: DefaultDict[str, set[str]] = collections.defaultdict(set)
+        reverse_dependencies: collections.defaultdict[str, set[str]] = (
+            collections.defaultdict(set)
+        )
 
         for candidate in resolver_result.mapping.values():
             stripped_name = strip_extras(canonicalize_name(candidate.name))

piptools/sync.py

@@ -5,7 +5,7 @@
 import sys
 import tempfile
 from subprocess import run  # nosec
-from typing import Deque, Iterable, Mapping, ValuesView
+from typing import Iterable, Mapping, ValuesView
 
 import click
 from pip._internal.models.direct_url import ArchiveInfo
@@ -54,7 +54,7 @@ def dependency_tree(
     :type root_key: str
     """
     dependencies = set()
-    queue: Deque[Distribution] = collections.deque()
+    queue: collections.deque[Distribution] = collections.deque()
 
     if root_key in installed_keys:
         dep = installed_keys[root_key]