chore(starters): add gatsby-typescript-starter-default

[RobertoMSousa]

Description

There are no starters using eslint and prettier with typescript and since officially since the tslint will be deprecated it would be good for devs to start using eslint instead.

[freiksenet]

Thank you for this contribution. Please add new entries to the end of file, not to the beginning. This simplifies diffs.

[RobertoMSousa]

Thank you for this contribution. Please add new entries to the end of file, not to the beginning. This simplifies diffs.

Thanks for your review. Just did the required changes.

[wardpeet]

Awesome! thanks for creating a simple example with typescript

fixed

[gatsbot]

Holy buckets, @RobertoMSousa — we just merged your PR to Gatsby! 💪💜

Gatsby is built by awesome people like you. Let us say “thanks” in two ways:

1. We’d like to send you some Gatsby swag. As a token of our appreciation, you can go to the Gatsby Swag Store and log in with your GitHub account to get a coupon code good for one free piece of swag. We’ve got Gatsby t-shirts, stickers, hats, scrunchies, and much more. (You can also unlock even more free swag with 5 contributions — wink wink nudge nudge.) See gatsby.dev/swag for details.
2. We just invited you to join the Gatsby organization on GitHub. This will add you to our team of maintainers. Accept the invite by visiting https://github.com/orgs/gatsbyjs/invitation. By joining the team, you’ll be able to label issues, review pull requests, and merge approved pull requests.

If there’s anything we can do to help, please don’t hesitate to reach out to us: tweet at @gatsbyjs and we’ll come a-runnin’.

Thanks again!