Update @types/express-jwt version

[Abazhenov]

@types/express-jwt 0.0.34 declares the following global type for express's req.user object

declare global {
    namespace Express {
        export interface Request {
            user?: any
        }
    }
}

Due to this - when trying to type out the req.user project in your own project the following error is thrown:

node_modules/@types/express-jwt/index.d.ts:43:13 - error TS2717: Subsequent property declarations must have the same type. Property 'user' must be of type '{ id: string }', but here has type 'any'

This PR updates @types/express-jwt to its latest version - which no longer declares a global express type.

[damieng]

Thanks! This actually also needed to be made a devDependency so it's been done in #91