This PR updates the curl dependency to the latest released 8.18.0 and modifies the preinstall script to point to the appropriate subdirectory.

8.18.0 is needed to mitigate a large number of identified CVEs in this package since the previous bump.

Release information and package for curl: https://github.com/curl/curl/releases/tag/curl-8_18_0

Relates to: #159

Checklist

• I have run npm install to generate the package-lock.json correctly and included it in the PR.

By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license.