remove 'pug' from nodemon command (we don't use pug)

package.json

@@ -106,6 +106,6 @@
     "test": "standard && depcheck --ignores=buble,lodash.merge,nodemon,gh-release --ignore-dirs=build,dist && node ./bin/extra-lint.js",
     "test-integration": "npm run build && node ./test",
     "update-authors": "./bin/update-authors.sh",
-    "watch": "nodemon --exec \"npm run start\" --ext js,pug,css --ignore build/ --ignore dist/"
+    "watch": "nodemon --exec \"npm run start\" --ext js,css --ignore build/ --ignore dist/"
   }
 }