Fix the currently broken facebook connector (#1989)

* Fix facebook connector not working likely due to API updates

* How to avoid "No matching user found" error

* Fix linting

---------

Co-authored-by: Jacob Tomlinson <jacob@tomlinson.email>

docs/connectors/facebook.md

@@ -14,6 +14,7 @@ Follow the steps to get access token :
  - Once the app is created, go to app’s Settings, and under PRODUCTS, click Add Product. Select Messenger, and choose to Set up the messenger product.
  - Generate a `page-access-token` for the page you created to start using Facebook APIs
  - Create a webhook pointing to `http(s)://your-bot-url.com:port/connector/facebook`
+ - Subscribe to all events for the webhook except for message_echoes to avoid an error like `{"error":{"message":"(#100) No matching user found","type":"OAuthException"...`
  - Randomly generate a `verify-token` and add that to the webhook
 
 ## Configuration

opsdroid/connector/facebook/__init__.py

@@ -10,7 +10,7 @@
 from opsdroid.events import Message
 
 _LOGGER = logging.getLogger(__name__)
-_FACEBOOK_SEND_URL = "https://graph.facebook.com/v2.6/me/messages" "?access_token={}"
+_FACEBOOK_SEND_URL = "https://graph.facebook.com/v16.0/me/messages" "?access_token={}"
 CONFIG_SCHEMA = {
     Required("verify-token"): str,
     Required("page-access-token"): str,
@@ -73,10 +73,11 @@ async def facebook_message_handler(self, request):
                     _LOGGER.debug(fb_msg)
                     try:
                         message = Message(
-                            fb_msg["sender"]["id"],
-                            fb_msg["sender"]["id"],
-                            self,
-                            fb_msg["message"]["text"],
+                            text=fb_msg["message"]["text"],
+                            user=fb_msg["sender"]["id"],
+                            user_id=fb_msg["sender"]["id"],
+                            target=fb_msg["sender"]["id"],
+                            connector=self,
                         )
                         await self.opsdroid.parse(message)
                     except KeyError as error: