prop-types dependency resolution

[meirish]

Describe the bug
I was looking into an embroider migration, but kept running into an addon in our monorepo not being able to find copy-button.js. So when I tried building that addon independently, I get the following error:

ember-cli-clipboard needs prop-types satisfying ^15.8.1, but we have version 15.7.2 because of ember-arg-types

It looks like ember-arg-types needs to have the prop-types dependency to ^15.8.1 - it's currently at ^15.7.2.

[jkusa]

fixed via jkusa/ember-arg-types#99