Add missing types (#102)

Author: isra17

sqlalchemy-stubs/engine/base.pyi

@@ -98,7 +98,7 @@ class Engine(Connectable, log.Identified):
     def name(self): ...
     @property
     def driver(self): ...
-    def dispose(self): ...
+    def dispose(self) -> None: ...
     def begin(self, close_with_result: bool = ...): ...
     def transaction(self, callable_, *args, **kwargs): ...
     def run_callable(self, callable_, *args, **kwargs): ...

sqlalchemy-stubs/sql/operators.pyi

@@ -1,4 +1,6 @@
-from typing import Any, Optional, Text
+from typing import Any, Optional, Text, List, Union
+from .selectable import Select as Select
+from .elements import BindParameter as BindParameter
 
 class Operators(object):
     def __and__(self, other): ...
@@ -40,8 +42,8 @@ class ColumnOperators(Operators):
     def concat(self, other): ...
     def like(self, other: Text, escape: Optional[Any] = ...): ...
     def ilike(self, other: Text, escape: Optional[Any] = ...): ...
-    def in_(self, other): ...
-    def notin_(self, other): ...
+    def in_(self, other: Union[List[Any], BindParameter, Select]): ...
+    def notin_(self, other: Union[List[Any], BindParameter, Select]): ...
     def notlike(self, other, escape: Optional[Any] = ...): ...
     def notilike(self, other, escape: Optional[Any] = ...): ...
     def is_(self, other): ...