Bump to olm 2.1.0

Author: richvdh

package.json

@@ -123,7 +123,7 @@
     "webpack-dev-server": "^1.16.2"
   },
   "optionalDependencies": {
-    "olm": "https://matrix.org/packages/npm/olm/olm-2.0.0.tgz"
+    "olm": "https://matrix.org/packages/npm/olm/olm-2.1.0.tgz"
   },
   "build": {
     "appId": "im.riot.app",