.jpmignore .xpis; updateURL in package.json; 0.9.2

package.json

@@ -2,7 +2,7 @@
   "name": "testpilot-containers",
   "title": "Containers Experiment",
   "description": "Containers works by isolating cookie jars using separate origin-attributes defined visually by colored ‘Container Tabs’. This add-on is a modified version of the containers feature for Firefox Test Pilot.",
-  "version": "0.9.0",
+  "version": "0.9.1",
   "author": "Andrea Marchesini, Luke Crouch and Jonathan Kingston",
   "bugs": {
     "url": "https://github.com/mozilla/testpilot-containers/issues"
@@ -44,5 +44,6 @@
     "lint:html": "htmllint webextension/*.html",
     "lint:js": "eslint .",
     "test": "npm run lint"
-  }
+  },
+  "updateURL": "https://testpilot.firefox.com/files/@testpilot-containers/updates.json"
 }