Refactor events file structure

tests/events/test_client_payload.py

@@ -13,7 +13,7 @@ from fbchat import (
     UnsendEvent,
     MessageReplyEvent,
 )
-from fbchat._client_payload import parse_client_delta, parse_client_payloads
+from fbchat._events._client_payload import parse_client_delta, parse_client_payloads
 
 
 def test_reaction_event_added(session):

tests/events/test_delta_class.py

@@ -17,7 +17,7 @@ from fbchat import (
     MessageEvent,
     ThreadFolder,
 )
-from fbchat._delta_class import parse_delta
+from fbchat._events._delta_class import parse_delta
 
 
 def test_people_added(session):

tests/events/test_delta_type.py

@@ -29,7 +29,7 @@ from fbchat import (
     PlanDeleted,
     PlanResponded,
 )
-from fbchat._delta_type import parse_delta
+from fbchat._events._delta_type import parse_delta
 
 
 def test_color_set(session):

tests/events/test_main.py

@@ -13,7 +13,7 @@ from fbchat import (
     UnfetchedThreadEvent,
     ActiveStatus,
 )
-from fbchat._event import parse_delta, parse_events
+from fbchat._events import parse_delta, parse_events
 
 
 def test_t_ms_full(session):