Cheng Fan

Snyk has created this PR to fix one or more vulnerable packages in the `npm` dependencies of this project. #### Changes included in this PR - Changes to the following...

Replace optional NPM dependency webworker-threads with web-worker

3

Looks like [webworker-threads](https://github.com/audreyt/node-webworker-threads) is not maintained anymore, and the author recommends to use [web-worker](https://www.npmjs.com/package/web-worker) instead: https://github.com/audreyt/node-webworker-threads/issues/204 https://github.com/audreyt/node-webworker-threads/issues/206