Add typings

[Jytesh]

Will enable autocompletion in supported text editors/IDEs.
Previous discussion in #22
To prevent definitions going out of sync we should either include some sort of test to validate the definitions or alternatively they be generated from our source (annotated comments?).

From #25

Better to add the typings from PR: #30 instead of translating the whole thing to typescript (IMO)

[Jytesh]

https://github.com/DefinitelyTyped/DefinitelyTyped/blob/master/types/keyv/index.d.ts

This is also a good reference

[Kikobeats]

I think keeping types at DefinitelyTyped repository it's great because it allows any member of the community to edit it without releasing a new keyv version.

Also I think that's a good practice inside TypeScript community, e.g.,
https://github.com/browserless/chrome/blob/master/base/Dockerfile#L85

[Jytesh]

Alright then! Any idea how to test those, and have a notif or something when the typings go out of sync?

[Jytesh]

And I think the types at @types/keyv only provide types for keyv by default, do we need to enable/configure something to make @keyvhq/keyv use the same typings

[Jytesh]

And I think the types at @types/keyv only provide types for keyv by default, do we need to enable/configure something to make @keyvhq/keyv use the same typings

@Kikobeats ^^