Remove outdated Node builds

[MadLittleMods]

Remove outdated Node builds

Fix https://github.com/MadLittleMods/node-usb-detection/issues/140

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It appears like the Travis builds have been failing on tagged releases since 4.8.0, https://travis-ci.org/github/MadLittleMods/node-usb-detection/jobs/678826650 but there are still prebuild artifacts since then so I'm not sure.

And same error as today:

• 4.8.0 build: https://travis-ci.org/github/MadLittleMods/node-usb-detection/jobs/678826650
• 4.11.0 build: https://travis-ci.org/github/MadLittleMods/node-usb-detection/jobs/761538461

gyp: name 'v8_enable_pointer_compression' is not defined while evaluating condition 'v8_enable_pointer_compression == 1' in binding.gyp while trying to load binding.gyp

• https://github.com/prebuild/prebuildify/issues/10
• https://github.com/prebuild/prebuild/pull/223
• https://github.com/node-ffi-napi/node-ffi-napi/commit/0d1de61710153bf0e6f6c7fa51bba8610ba9dc09

[mcous]

I've been digging into this some more, and I have a question and an idea:

• How are the prebuilt assets uploaded? I can't figure out how prebuild --upload gets called
• Both the Travis matrix and the AppVeryor matrix are set up to call prebuild --all on every singe build in the matrix, but I'm pretty sure this is unnecesary
  • Based on local testing, I think only one call to prebuild --all is required per OS/arch
  • e.g. only call prebuild --all on Node v14, and it'll generate assets for previous ABI's, too

On top of that, travis-ci.org has been deprecated in favor of travis-ci.com, so that needs to be figured out

[MadLittleMods]

@mcous Feel free to simplify and rip out the old way builds were working to make it sane.