Add documentation for the WebhookCallDispatchedEvent

Author: thannaske

README.md

@@ -116,7 +116,7 @@ WebhookCall::create()
    ->dispatch();
 ```
 
-This will send a post request to `https://other-app.com/webhooks`. The body of the request will be JSON encoded version of the array passed to `payload`. The request will have a header called `Signature` that will contain a signature the receiving app can use [to verify](https://github.com/spatie/laravel-webhook-server#how-signing-requests-works) the payload hasn't been tampered with. 
+This will send a post request to `https://other-app.com/webhooks`. The body of the request will be JSON encoded version of the array passed to `payload`. The request will have a header called `Signature` that will contain a signature the receiving app can use [to verify](https://github.com/spatie/laravel-webhook-server#how-signing-requests-works) the payload hasn't been tampered with. Dispatching a webhook call will also fire a `WebhookCallDispatchedEvent`.
 
 If the receiving app doesn't respond with a response code starting with `2`, the package will retry calling the webhook after 10 seconds. If that second attempt fails, the package will attempt to call the webhook a final time after 100 seconds. Should that attempt fail, the `FinalWebhookCallFailedEvent` will be raised.
 
@@ -384,6 +384,7 @@ WebhookCall::create()
 ### Events
 
 The package fires these events:
+- `WebhookCallDispatchedEvent`: the webhook call has been initially dispatched to the queue.
 - `WebhookCallSucceededEvent`: the remote app responded with a `2xx` response code.
 - `WebhookCallFailedEvent`: the remote app responded with a non `2xx` response code, or it did not respond at all
 - `FinalWebhookCallFailedEvent`: the final attempt to call the webhook failed.
@@ -396,9 +397,12 @@ All these events have these properties:
 - `headers`: the headers that were sent. This array includes the signature header
 - `meta`: the array of values passed to the webhook with [the `meta` call](#adding-meta-information)
 - `tags`: the array of [tags](#adding-tags) used
+- `uuid`: a unique string to identify this call. This uuid will be the same for all attempts of a webhook call.
+
+Except for the `WebhookCallDispatchedEvent`, all events have these additional properties:
+
 - `attempt`: the attempt number
 - `response`: the response returned by the remote app. Can be an instance of `\GuzzleHttp\Psr7\Response` or `null`.
-- `uuid`: a unique string to identify this call. This uuid will be the same for all attempts of a webhook call.
 
 ## Testing