Remove TTY package due to security vulnerability

[jonathanpeterwu]

Removal of usage of tty npm package as it's been removed from npm due to potential security issues.

https://www.npmjs.com/package/tty

TODO:

• Update CHANGELOG.md* with your change (include reference to issue & this PR)
• Make sure all of the significant new logic is covered by tests
• Rebase your changes on master so that they can be merged easily
• Make sure all tests and linter rules pass

*Make sure changelog entries note which project(s) has been affected. See older entries for examples on what this looks like.

[apollo-cla]

@jonathanpeterwu: Thank you for submitting a pull request! Before we can merge it, you'll need to sign the Apollo Contributor License Agreement here: https://contribute.apollographql.com/