Add types for parse_qs and parse_qsl when taking bytes as input (#1020)

Author: dwetterau

stdlib/3/urllib/parse.pyi

@@ -97,9 +97,10 @@ class SplitResultBytes(_SplitResultBytesBase, _NetlocResultMixinBytes): ...
 class ParseResultBytes(_ParseResultBytesBase, _NetlocResultMixinBytes): ...
 
 
-def parse_qs(qs: str, keep_blank_values: bool = ..., strict_parsing: bool = ..., encoding: str = ..., errors: str = ...) -> Dict[str, List[str]]: ...
+def parse_qs(qs: AnyStr, keep_blank_values: bool = ..., strict_parsing: bool = ..., encoding: str = ..., errors: str = ...) -> Dict[AnyStr, List[AnyStr]]: ...
+
+def parse_qsl(qs: AnyStr, keep_blank_values: bool = ..., strict_parsing: bool = ..., encoding: str = ..., errors: str = ...) -> List[Tuple[AnyStr, AnyStr]]: ...
 
-def parse_qsl(qs: str, keep_blank_values: bool = ..., strict_parsing: bool = ..., encoding: str = ..., errors: str = ...) -> List[Tuple[str, str]]: ...
 
 @overload
 def quote(string: str, safe: AnyStr = ..., encoding: str = ..., errors: str = ...) -> str: ...