message: build: adapt browser file name to match vue and vuex [skip ci]
diff: "name": "vue-router",
  "version": "4.0.0-beta.9",
  "main": "dist/vue-router.cjs.js",
  - "browser": "dist/vue-router.esm.js",
  + "browser": "dist/vue-router.esm-browser.js",
  "unpkg": "dist/vue-router.global.js",
  "jsdelivr": "dist/vue-router.global.js",
  "module": "dist/vue-router.esm-bundler.js",
  