Include types for the package

[shrihari-prakash]

For the express-oauth-server counterpart from oauthjs, there are types specified in DefinitelyTyped: https://github.com/DefinitelyTyped/DefinitelyTyped/blob/master/types/express-oauth-server/index.d.ts

However for this project, there is nothing of that sort. It would be good to include the typings file from DefinitelyTypes and point to it in package.json. Right now, when I import the package on TypeScript projects, it would complain that there is no types associated:

[shrihari-prakash]

Hello @jankapunkt , @HappyZombies ,
I added types for this package from DefinitelyTyped. Could you please review and merge this if you feel it's okay? #11

[jankapunkt]

published in 3.0.1