lint in parallel as well, for good measure

package.json

@@ -23,7 +23,7 @@
     "dev": "node src/shared/_build.js && rollup -c rollup/rollup.config.main.js -w",
     "dev:shared": "rollup -c rollup/rollup.config.shared.js -w",
     "pretest": "npm run build",
-    "prepublish": "npm run build && npm run lint",
+    "prepublish": "npm run build & npm run lint",
     "prettier": "prettier --use-tabs --single-quote --trailing-comma es5 --write \"src/**/*.ts\""
   },
   "repository": {