Release 1.27.0 (#3571)

* bump version
* ignore .disabled for plugins
* simplify gitignore
* prevent duration field from showing up in the API
* change release template wording
* prepare method for later usage
* add 8.2 to issue template

src/Entity/User.php

@@ -1167,4 +1167,9 @@ class User implements UserInterface, EquatableInterface, \Serializable
     {
         $this->accountNumber = $accountNumber;
     }
+
+    public function isSystemAccount(): bool
+    {
+        return false;
+    }
 }