Change default for purge oldest_first to match history

discord/abc.py

@@ -125,7 +125,7 @@ async def _purge_helper(
     before: Optional[SnowflakeTime] = None,
     after: Optional[SnowflakeTime] = None,
     around: Optional[SnowflakeTime] = None,
-    oldest_first: Optional[bool] = False,
+    oldest_first: Optional[bool] = None,
     bulk: bool = True,
     reason: Optional[str] = None,
 ) -> List[Message]:

discord/channel.py

@@ -444,7 +444,7 @@ class TextChannel(discord.abc.Messageable, discord.abc.GuildChannel, Hashable):
         before: Optional[SnowflakeTime] = None,
         after: Optional[SnowflakeTime] = None,
         around: Optional[SnowflakeTime] = None,
-        oldest_first: Optional[bool] = False,
+        oldest_first: Optional[bool] = None,
         bulk: bool = True,
         reason: Optional[str] = None,
     ) -> List[Message]:
@@ -1165,7 +1165,7 @@ class VoiceChannel(discord.abc.Messageable, VocalGuildChannel):
         before: Optional[SnowflakeTime] = None,
         after: Optional[SnowflakeTime] = None,
         around: Optional[SnowflakeTime] = None,
-        oldest_first: Optional[bool] = False,
+        oldest_first: Optional[bool] = None,
         bulk: bool = True,
         reason: Optional[str] = None,
     ) -> List[Message]:

discord/threads.py

@@ -443,7 +443,7 @@ class Thread(Messageable, Hashable):
         before: Optional[SnowflakeTime] = None,
         after: Optional[SnowflakeTime] = None,
         around: Optional[SnowflakeTime] = None,
-        oldest_first: Optional[bool] = False,
+        oldest_first: Optional[bool] = None,
         bulk: bool = True,
         reason: Optional[str] = None,
     ) -> List[Message]: