✨ Add custom fields support

done

packages/nodes-base/nodes/ClickUp/GenericFunctions.ts

@@ -54,3 +54,13 @@ export async function clickupApiRequestAllItems(this: IHookFunctions | IExecuteF
 	);
 	return returnData;
 }
+
+export function validateJSON(json: string | undefined): any { // tslint:disable-line:no-any
+	let result;
+	try {
+		result = JSON.parse(json!);
+	} catch (exception) {
+		result = undefined;
+	}
+	return result;
+}