Since the Vue integration only affects a small portion of potential `ws-plus` users, the `vue` `peerDependency` should be marked optional using the [`peerDependenciesMeta` field supported since NPM 6.11](https://github.com/npm/cli/pull/224) [[example usage](https://github.com/bazelbuild/rules_nodejs/pull/1163/commits/58254b3888b976ac80cfa552c2c5040d73664e57)]
Since the Vue integration only affects a small portion of potential
ws-plususers, thevuepeerDependencyshould be marked optional using thepeerDependenciesMetafield supported since NPM 6.11 [example usage]