yarn check が警告を表示する
warning "chokidar#fsevents#node-pre-gyp@^0.10.0" could be deduped from "0.10.3" to "node-pre-gyp@0.10.3"
参考：
Why is `node-pre-gyp` a bundled dependency? · Issue #157 · strongloop/fsevents – GitHub
warning "chokidar#fsevents#node-pre-gyp@^0.10.0" could be deduped from "0.10.3" to "node-pre-gyp@0.10.3"
参考：
Why is `node-pre-gyp` a bundled dependency? · Issue #157 · strongloop/fsevents – GitHub