Rollback Iterator to Generator type hint

Author: Nougat-Waffle

src/dotenv/variables.py

@@ -1,6 +1,6 @@
 import re
 from abc import ABCMeta, abstractmethod
-from typing import Generator, Mapping, Optional, Pattern
+from typing import Iterator, Mapping, Optional, Pattern
 
 _posix_variable: Pattern[str] = re.compile(
     r"""
@@ -67,7 +67,7 @@ def resolve(self, env: Mapping[str, Optional[str]]) -> str:
         return result or ""
 
 
-def parse_variables(value: str) -> Generator[Atom, None, None]:
+def parse_variables(value: str) -> Iterator[Atom]:
     cursor = 0
 
     for match in _posix_variable.finditer(value):