Roll back prebuildify to 5.x.x

[thegecko]

Changes

• Temporary rollback to prebuildify 5.x.x

Fixes

As described in #743 , this change introduced naming compatibility issues.

This rolls back the version of prebuildify until this issue is fixed in prebuild/prebuildify#80 (props to @strazzere)

Checklist

Have you...

• Tested the change acts as expected
• Checked the change doesn't remove or change existing functionality
• Considered how the feature impacts the product and tested around it (not just the happy paths)
• Where possible, executed the hardware tests on multiple operating systems