Do not TypeAlias for python < 3.10

Author: has2k1

quartodoc/pandoc/blocks.py

@@ -3,11 +3,17 @@
 """
 from __future__ import annotations
 
+import sys
 import itertools
 import typing
-from typing import Literal, Optional, TypeAlias, Sequence
 import collections.abc as abc
 
+from typing import Literal, Optional, Sequence
+if sys.version_info >= (3, 10):
+    from typing import TypeAlias
+else:
+    TypeAlias = "TypeAlias"
+
 from textwrap import indent
 from dataclasses import dataclass
 

quartodoc/pandoc/inlines.py

@@ -4,9 +4,15 @@
 from __future__ import annotations
 
 import collections.abc as abc
+import sys
+
 from dataclasses import dataclass
 from pathlib import Path
-from typing import TypeAlias, Optional, Sequence
+from typing import Optional, Sequence
+if sys.version_info >= (3, 10):
+    from typing import TypeAlias
+else:
+    TypeAlias = "TypeAlias"
 
 from quartodoc.pandoc.components import Attr