Pass arbitrary info from Strategy#validate to done callback

Some passport strategies require to pass arbitrary arguments to done callback. For example https://github.com/jaredhanson/passport-totp#configure-strategy requires to pass key and period. Or it can be info data for req.authInfo (related to nestjs#24).
Now one can return array from Strategy#validate method, like
```ts
async validate(payload: JwtPayload) {
    const user = await this.authService.validateUser(payload);
    if (!user) {
      throw new UnauthorizedException();
    }
    return [user, 'some info'];
  }
```

lib/passport/passport.strategy.ts

@@ -13,7 +13,12 @@ export function PassportStrategy<T extends Type<any> = any>(
       const callback = async (...params: any[]) => {
         const done = params[params.length - 1];
         try {
-          done(null, await this.validate(...params));
+          const validateResult = await this.validate(...params));
+          if (Array.isArray(validateResult)) {
+            done(null, ...validateResult);
+          } else {
+            done(null, validateResult);
+          }
         } catch (err) {
           done(err, null);
         }