docs: crashReporter companyName is not optional

docs/api/crash-reporter.md

@@ -42,7 +42,7 @@ The `crashReporter` module has the following methods:
 ### `crashReporter.start(options)`
 
 * `options` Object
-  * `companyName` String (optional)
+  * `companyName` String
   * `submitURL` String - URL that crash reports will be sent to as POST.
   * `productName` String (optional) - Defaults to `app.getName()`.
   * `uploadToServer` Boolean (optional) - Whether crash reports should be sent to the server