add phpmailer

composer.json

@@ -3,6 +3,7 @@
 		"elasticsearch/elasticsearch": "~7.0",
 		"guzzlehttp/guzzle": "7.0",
 		"catfan/medoo": "^2.1",
-		"casbin/casbin": "^3.9"
+		"casbin/casbin": "^3.9",
+		"phpmailer/phpmailer": "^6.5"
 	}
 }