fix: trello failing on degraded service

src/trello.js

@@ -9,10 +9,7 @@ let cache;
 async function getTrelloCache() {
 	const available = await trelloAPIAvailable();
 	if (!available) {
-		return {
-			update_time: Date.now(),
-			sections: []
-		};
+		return cache;
 	}
 
 	if (!cache) {
@@ -79,7 +76,7 @@ async function updateTrelloCache() {
 
 async function trelloAPIAvailable() {
 	const { status } = await got('https://trello.status.atlassian.com/api/v2/status.json').json();
-	return status.description === 'All Systems Operational';
+	return status.indicator !== 'major' && status.indicator !== 'critical';
 }
 
 module.exports = {