parsimonious: re.Match does not exist in Python 3.6 (#7482)

It has to be imported from `typing` in <3.7.
Refs #7478.

Author: AlexWaygood

stubs/parsimonious/parsimonious/nodes.pyi

@@ -1,5 +1,4 @@
-from re import Match
-from typing import Any, Callable, Iterator, NoReturn, Sequence, TypeVar
+from typing import Any, Callable, Iterator, Match, NoReturn, Sequence, TypeVar
 
 from parsimonious.exceptions import VisitationError as VisitationError
 from parsimonious.expressions import Expression