Fix typo

main.js

@@ -92,7 +92,7 @@ function checkSMS() {
         });
     });
     req.on('error', error => {
-        logger.warning(error);
+        logger.warn(error);
     });
     req.end();
 }
@@ -502,11 +502,11 @@ client.on("Room.timeline", function (event, room) {
         }
         if (event.getTs() < (Date.now() - 1000 * 60 * 60 * 8)) {
             // Ignore old events (8 hrs), they're probably duplicates or something.
-            logger.warning("Ignoring stale Matrix room event [" + event.getId() + "]: older than 8 hours");
+            logger.warn("Ignoring stale Matrix room event [" + event.getId() + "]: older than 8 hours");
             return;
         }
         if (event.getTs() < boottimestamp) {
-            logger.warning("Ignoring stale Matrix room event [" + event.getId() + "]: event predates start of this program");
+            logger.warn("Ignoring stale Matrix room event [" + event.getId() + "]: event predates start of this program");
             return;
         }
         if (event.getContent() == null || typeof event.getContent().body == "undefined" || event.getContent().body == null) {