message: Update web-ext-submit
diff: "test": "npm run lint && cross-env BABEL_ENV=testing ava && run-s build",
  "build": "webpack --mode=production",
  "watch": "webpack --mode=development --watch",
  - "release:amo": "cd distribution && webext submit",
  + "release:amo": "cd distribution && web-ext-submit",
  "release:cws": "cd distribution && webstore upload --auto-publish",
  "release": "run-s build update-version save-url release:*",
  "save-url": "echo https://github.com/$TRAVIS_REPO_SLUG/tree/$TRAVIS_COMMIT > distribution/SOURCE_URL",
  "stylelint-config-xo": "^0.11.0",
  "uglifyjs-webpack-plugin": "^1.3.0",
  "utc-version": "^1.1.0",
  - "webext": "^1.9.1-with-submit.1",
  + "web-ext-submit": "^2.9.2",
  "webpack": "^4.17.2",
  "webpack-cli": "^3.1.0",
  "xo": "^0.23.0"
  