Client is not a constructor. Erroneous typescript definition. Misleading docs.

[PaulSzymanski]

Describe the bug The TS definition exposes the Client constructor. However, the Client constructor is only accessible on an Issuer instance.

Hence TS will not complain if you write new Client(clientMetadata).

Also the docs are misleading.

To Reproduce

const client = new Client(recoveredClientMetadata)

Expected behaviour Either TS complaining or the library directly exposing the constructor.

Environment:

• openid-client version: v4.9.1
• node version: v12

Additional context This bug was probably causing confusion here as well: https://github.com/panva/node-openid-client/issues/213

• [x] the bug is happening on latest openid-client too.
• [x] i have searched the issues tracker on github for similar issues and couldn't find anything related.

[panva]

I find nothing misleading about the docs, all examples show how to obtain the Client constructor. That the types are messed up is a pity, PR is welcome, they've been like this since their inclusion two years ago. Not a big deal IMHO since all the docs show the correct way of instantiating a Client.