Add typescript peer dependency

[kiancross]

What did you implement:

typescript is a peer dependency of ts-node. Therefore it needs to be provided by this package; I have added it as a peer dependency.

How did you implement it:

See above.

How can we verify it:

• See that typescript it is a peer dependency of ts-node here.
• View package.json to see the change

Tasks:

• Write tests
• Write documentation
• Fix linting errors
• Make sure code coverage hasn't dropped
• Provide verification config / commands / resources
• Enable "Allow edits from maintainers" for this PR
• Update the messages below

Is this ready for review?: YES
Is it a breaking change?: NO

[hassankhan]

Hi @kiancross, apologies I've only just had my commit privileges restored and realised that Travis CI doesn't work any more; going to need to switch over to GitHub Actions before the Ci can release a new version. I've created a new issue for that: #185

[kiancross]

@hassankhan No problem - thanks for the update.

[beautyfree]

It's still actual for users of yarn 2+

[xboy2012]

Why the PR is blocked here? Please review and approve it. @hassankhan

[simPod]

I believe this lib is abandoned.