Merge pull request #3857 from matrix-org/t3chguy/Array.concat

Fix Array.concat undefined

src/components/views/settings/tabs/room/BridgeSettingsTab.js

@@ -137,7 +137,7 @@ export default class BridgeSettingsTab extends React.Component {
         const client = MatrixClientPeg.get();
         const roomState = (client.getRoom(roomId)).currentState;
 
-        const bridgeEvents = Array.concat(...BRIDGE_EVENT_TYPES.map((typeName) =>
+        const bridgeEvents = [].concat(...BRIDGE_EVENT_TYPES.map((typeName) =>
             Object.values(roomState.events[typeName] || {}),
         ));