eslint: no-extend-native false positive

Applying standard@10.0.1 to the npm package migrate and it has a constructor called Set. Obviously it might not be the best name since it is a native constructor now, but eslint should probably recognize that it is not actually modifying the native.

Projects/node-migrate/lib/set.js:52:1: Set prototype is read only, properties should not be added.

function Set (path) {}
Set.prototype.addMigration = function (title, up, down) {}