Add PHP type hints for Laravel 10

app/Models/TeamInvitation.php

@@ -2,6 +2,7 @@
 
 namespace App\Models;
 
+use Illuminate\Database\Eloquent\Relations\BelongsTo;
 use Laravel\Jetstream\Jetstream;
 use Laravel\Jetstream\TeamInvitation as JetstreamTeamInvitation;
 
@@ -22,7 +23,7 @@ class TeamInvitation extends JetstreamTeamInvitation
      *
      * @return \Illuminate\Database\Eloquent\Relations\BelongsTo
      */
-    public function team()
+    public function team(): BelongsTo
     {
         return $this->belongsTo(Jetstream::teamModel());
     }