Wrap unions in NewType to allow setattr

This fixes Python 3.6 and 3.9 compatibility

Backported from 9a10cfe

mautrix/__init__.py

@@ -1,3 +1,3 @@
-__version__ = "0.7.13"
+__version__ = "0.7.14"
 __author__ = "Tulir Asokan <[email protected]>"
 __all__ = ["api", "appservice", "bridge", "client", "crypto", "errors", "util", "types"]

mautrix/types/auth.py

@@ -3,7 +3,7 @@
 # This Source Code Form is subject to the terms of the Mozilla Public
 # License, v. 2.0. If a copy of the MPL was not distributed with this
 # file, You can obtain one at http://mozilla.org/MPL/2.0/.
-from typing import Union, Optional, List
+from typing import Union, Optional, List, NewType
 from attr import dataclass
 import attr
 
@@ -93,7 +93,8 @@ class PhoneIdentifier(SerializableAttrs['PhoneIdentifier']):
     type: UserIdentifierType = UserIdentifierType.PHONE
 
 
-UserIdentifier = Union[MatrixUserIdentifier, ThirdPartyIdentifier, PhoneIdentifier]
+UserIdentifier = NewType('UserIdentifier',
+                         Union[MatrixUserIdentifier, ThirdPartyIdentifier, PhoneIdentifier])
 
 
 @deserializer(UserIdentifier)

mautrix/types/event/encrypted.py

@@ -3,7 +3,7 @@
 # This Source Code Form is subject to the terms of the Mozilla Public
 # License, v. 2.0. If a copy of the MPL was not distributed with this
 # file, You can obtain one at http://mozilla.org/MPL/2.0/.
-from typing import Optional, Dict, Union
+from typing import Optional, Dict, Union, NewType
 from enum import IntEnum, Enum
 from attr import dataclass
 import attr
@@ -73,7 +73,8 @@ def relates_to(self, relates_to: RelatesTo) -> None:
         self._relates_to = relates_to
 
 
-EncryptedEventContent = Union[EncryptedOlmEventContent, EncryptedMegolmEventContent]
+EncryptedEventContent = NewType('EncryptedEventContent',
+                                Union[EncryptedOlmEventContent, EncryptedMegolmEventContent])
 
 
 @deserializer(EncryptedEventContent)