update dependency chokidar to fix Regular expression denial of service glob-parent

[automaticdreams]

https://npmjs.com/advisories/1751

[Shakes03]

+1

[nycdotnet]

Hi - sorry this isn't really maintained anymore. As for DoS in your build system, hostile globs are not really part of the threat model for this plugin, so it's likely this advisory can be ignored.