Remove old Node versions no longer supported by Github actions

[spmiller]

https://github.blog/changelog/2023-06-13-github-actions-all-actions-will-run-on-node16-instead-of-node12-by-default/

Removing support for these older versions (everything below 16) ensures a successful build.

[spmiller]

Hi @paulrutter, hopefully you can squash all those commits when you merge, it's a bit embarrassing how many it took to get right since I couldn't test locally.

[paulrutter]

Thanks, i will take a look!

[paulrutter]

Didn't manage to squash, bit i did merge the changes and added 20.x to it as well.
Let's see if it works now.

[paulrutter]

No luck yet, see https://github.com/blueconic/node-oom-heapdump/actions/runs/6650420876

[spmiller]

Looks like an error in the 20.x branch you added. Perhaps the API is different in v20?

../lib/node_oom_heapdump_native.cc:91:31: error: invalid conversion from ‘void (*)(const char*, bool)’ to ‘v8::OOMErrorCallback’ {aka ‘void (*)(const char*, const v8::OOMDetails&)’} [-fpermissive]

[paulrutter]

I will remove 20.x for now and try again.

[paulrutter]

https://github.com/blueconic/node-oom-heapdump/actions/runs/6651842671

[paulrutter]

I will investigate Node20 later, probably something needs to be added in the code itself first.

[paulrutter]

I fixed node20 support and added it to to Github actions: https://github.com/blueconic/node-oom-heapdump/actions/runs/6664282388

[spmiller]

Nice one!