Upgrade to some new nextcloud standards

lib/Db/Task.php

@@ -0,0 +1,24 @@
+<?php
+namespace OCA\QuickNotes\Db;
+
+use JsonSerializable;
+
+use OCP\AppFramework\Db\Entity;
+
+class Note extends Entity implements JsonSerializable {
+
+	protected $description;
+	protected $done;
+	protected $ordering;
+	protected $noteId;
+
+	public function jsonSerialize() {
+		return [
+			'id' => $this->id,
+			'description' => $this->description,
+			'done' => $this->done,
+			'ordering' => $this->ordering,
+			'noteId' => $this->noteId
+		];
+	}
+}