express: TypeScript error with latest type definitions
Hi @simov, I'm sorry to bother you, but it seems the TS definitions are broken using latest versions of grant + express

```typescript
src/routes/auth.ts:18:32 - error TS2339: Property 'grant' does not exist on type 'Session & Partial<SessionData>'.

18   const profile = req.session?.grant?.response?.profile;
```

**Dependencies:**

- grant@5.4.9
- @types/express-session@1.17.3
- @types/express@4.17.9

**By reverting the dependencies to these versions, the TS error is gone:**
- grant@5.4.5
- @types/express-session@1.17.0
- @types/express@4.17.8