Please fill in this template.

• Use a meaningful title for the pull request. Include the name of the package modified.
• Have read How To Contribute.
• Run npm test at the sub modules where changes have occurred.
• Run npm run lint to ensure code style at the turf module level.

This PR uses the new @turf/jsts package rather than turf-jsts.

You can see the difference in bundle sizes for those packages:

https://bundlephobia.com/package/@turf/jsts@2.7.1
https://bundlephobia.com/package/turf-jsts@1.2.3

Assuming you had a barebones build that used @turf/buffer you'd see the following improvements (around 18% decrease in bundle size):

Before:

After: