Add TypeScript definition

[netroy]

The tests are failing because Object.entries isn't available on node 6.

If you'd like I can send another PR to either change the tests to run for now 8, & 10. Or, I ca send a PR to switch to Object.keys instead.

Cheers

[sindresorhus]

For packages with a default export, use export default foo;, not export = foo;. You will have to add module.exports.default = foo; to the index.js file.

All types used in the public interface should be export'ed.

Don't prefix the name of interfaces with I; Options, not IOptions.

Prefer using the unknown type instead of any whenever possible.

• https://github.com/sindresorhus/typescript-definition-style-guide

[sindresorhus]

The tests are failing because Object.entries isn't available on node 6.

Don't worry about it. I'll fix that after merging.

[netroy]

@sindresorhus I've made the requested changes. can you have a look at this again?

[sindresorhus]

For packages with a default export, use export default foo;, not export = foo;. You will have to add module.exports.default = foo; to the index.js file.

Not done.

[sindresorhus]

The method should be documented, per https://github.com/sindresorhus/typescript-definition-style-guide#documentation

[sindresorhus]

Ping :)

[mastermatt]

@sindresorhus do you still plan on implementing this? I came across this PR when looking at missing types for got.

[sindresorhus]

// @bendingbender Would you be able to prioritize this package?