extract_utils: T | T -> Union[T, T]

Fixes the following error when using Python 3.8:

Traceback (most recent call last):
  File "./extract-files.py", line 15, in <module>
    from extract_utils.main import (
  File "/home/luk/lineage-22/tools/extract-utils/extract_utils/main.py", line 13, in <module>
    from extract_utils.extract import ExtractCtx
  File "/home/luk/lineage-22/tools/extract-utils/extract_utils/extract.py", line 72, in <module>
    extract_fns_user_type = extract_fns_dict_type | extract_fns_type
TypeError: unsupported operand type(s) for |: '_GenericAlias' and '_GenericAlias'

Change-Id: I5e8131004e81edd0e3e1a89ce1934abc7959092a

Author: luk1337

extract_utils/extract.py

@@ -69,7 +69,7 @@ def __init__(
 
 
 extract_fns_type = List[ExtractFn]
-extract_fns_user_type = extract_fns_dict_type | extract_fns_type
+extract_fns_user_type = Union[extract_fns_dict_type, extract_fns_type]
 
 
 class ExtractCtx: