Bump napi-build-utils from 1 to 2

[baileympearson]

Fixes #203.

I don't have a good mechanism to test the changes inside prebuild-install without publishing releases of these packages, but I can test the new version of napi-build-utils in our package and confirm that it detects the correct version of napi.

I tested this in the @mongodb-js/zstd package by installing napi-build-utils@2.0.0 and confirming that it now detects an napi version of 4:

before fix:

> require('napi-build-utils/package.json').version
'1.0.2'
> require('./package.json').binary
{ napi_versions: [ 4 ] }
> require('napi-build-utils').getBestNapiBuildVersion()
undefined

after fix:

> require('./package.json').binary
{ napi_versions: [ 4 ] }
> require('napi-build-utils/package.json').version
'2.0.0'
> require('napi-build-utils').getBestNapiBuildVersion()
4

let met know if there's anything else you'd like in this PR or any additional testing you can think of. Thanks!

[vweevers]

For anyone wondering why napi-build-utils 2.0.0 is a breaking change, it's not:

This version was introduced to address a limitation when the Node-API version reached 10 in NodeJS v23.6.0. There was no change in the API, but a SemVer bump to 2.0.0 was made out of an abundance of caution.
— History

We can release this as a patch here.

[baileympearson]

Is there any estimate on when a release with this fix might be available? @vweevers

[vweevers]

Released in 7.1.3. Thanks!