Upgrade node-pty to fix build errors

[MatthewScholefield]

This fixes #14 and possibly #13.

Can install from my fork with:

# For yarn:
yarn global add "https://github.com/MatthewScholefield/rekit-studio#patch-1"

# For npm (I think):
npm install -g "https://github.com/MatthewScholefield/rekit-studio#patch-1"

[supnate]

Thanks @MatthewScholefield , I will publish a new version including the update soon.

[MatthewScholefield]

@supnate Thanks for merging.

Edit: Updated with the following:

It still fails with #9, but I think this is just because I'm trying to install directly from my fork in git. It looks like it needs to be manually packaged for the direct installation to work.