chore(npm): always bundle assets before generating a package

package.json

@@ -99,7 +99,7 @@
     "test:jpm": "jpm test -b beta",
     "test:karma": "karma start --browsers FirefoxNightly",
     "tdd": "karma start --no-single-run",
-    "package": "jpm xpi && mv @activity-streams-$npm_package_version.xpi dist/activity-streams-$npm_package_version.xpi",
+    "package": "npm run bundle && jpm xpi && mv @activity-streams-$npm_package_version.xpi dist/activity-streams-$npm_package_version.xpi",
     "travis": "npm-run-all travis:*",
     "travis:eslint": "npm run test:lint",
     "travis:jpm": "jpm test -b $JPM_FIREFOX_BINARY -v",

yamscripts.yml

@@ -46,7 +46,7 @@ scripts:
   tdd: karma start --no-single-run
 
 # package: Build add-on
-  package: jpm xpi && mv @activity-streams-$npm_package_version.xpi dist/activity-streams-$npm_package_version.xpi
+  package: =>bundle && jpm xpi && mv @activity-streams-$npm_package_version.xpi dist/activity-streams-$npm_package_version.xpi
 
   # This is for ci
   travis: