Adds typings

[efredin]

Adds typescript support. Re-opened targeting new typescript branch on request of @abisalehalliprasan

In order to avoid adding external typing dependencies, I've left log() typings fairly generic. There is an @types/winston package available, but its probably not necessary.

[abisalehalliprasan]

Thanks @efredin will test it and get back to you

[efredin]

Anything I can contribute to help validate the typings?

[abisalehalliprasan]

@efredin : Thanks for checking with us. I am not too familiar with typescript, so would be helpful if you could show me how to use index.d.ts in the sample

I will be merging this PR into typescript branch and create a new issue for the sample. Does that work with you?

[efredin]

@abisalehalliprasan That works for me. I should be able to put some time to this next week.

The typings won't impact any javascript consumers. I can update the sample in that branch to a typescript project and run it through the typescript compiler to demonstrate things are working as expected.

[abisalehalliprasan]

@efredin : Awesome thanks

[abisalehalliprasan]

🚀 PR was released in branch typescript for hacktoberfest