chore: add ability to add organizer

src/NowCal/NowCal.php

@@ -48,7 +48,8 @@ class NowCal
         'duration',
         'sequence',
         'timezone',
-        'reminder'
+        'reminder',
+        'organizer',
     ];
 
     /**
@@ -191,6 +192,13 @@ class NowCal
      */
     public ?string $reminder = null;
 
+    /**
+     * The reminder for the event.
+     *
+     * @see https://www.rfc-editor.org/rfc/rfc5545#section-3.8.4.3
+     */
+    public ?string $organizer = null;
+
     /**
      * Instantiate the NowCal class.
      */
@@ -364,6 +372,13 @@ public function reminder(string|DateInterval|Closure $reminder): self
         return $this;
     }
 
+    public function organizer(string $organizer): self
+    {
+        $this->set('organizer', $organizer);
+
+        return $this;
+    }
+
     /**
      * Check if the key is allowed to be set.
      */
@@ -637,6 +652,15 @@ protected function createReminder(): void
         $this->output[] = 'END:VALARM';
     }
 
+    protected function createOrganizer(): void
+    {
+        if (!$this->organizer) {
+            return;
+        }
+
+        $this->output[] = 'ORGANIZER;CN=' . $this->organizer;
+    }
+
     /**
      * Get the provided parameter from the ICS spec. If not
      * included in the spec then fail. If not provided but