Use @airbnb/node-memwatch instead of @aide-master/node-memwatch

@aide-master/node-memwatch hasn't been updated for 3 years [1], so it
might be worthwhile exploring other forks like @airbnb/node-memwatch
that have been more recently touched.

After blowing away package-lock.json and rebuilding it with node
16.15.0, it appears that the node-gyp issue per [2] is fixed, so this
seems sufficient.

[1]: https://www.npmjs.com/package/@aidemaster/node-memwatch
[2]: andywer#34