Route manifest not compatible with Page.authenticate "redirectTo"

[remjx]

What is the problem?

When I try to do

SomePage.authenticate = { redirectTo: Routes.LoginPage() }

I get the TypeScript error error TS2322: Type 'RouteUrlObject' is not assignable to type 'string'.

What are detailed steps to reproduce this?

1. run tsc

Run blitz -v and paste the output here:

Windows 10 | win32-x64 | Node: v14.15.5

blitz: 0.34.3 (global)
blitz: 0.35.0 (local) 

  Package manager: npm 
  System:
    OS: Windows 10 10.0.19042
    CPU: (6) x64 Intel(R) Core(TM) i5-9600K CPU @ 3.70GHz
    Memory: 6.65 GB / 15.94 GB
  Binaries:
    Node: 14.15.5 - C:\Program Files\nodejs\node.EXE     
    Yarn: 1.22.10 - C:\Program Files\nodejs\yarn.CMD     
    npm: 6.14.11 - C:\Program Files\nodejs\npm.CMD
    Watchman: Not Found
  npmPackages:
    @prisma/client: ~2.20 => 2.20.1
    blitz: 0.35.0 => 0.35.0
    prisma: ~2.20 => 2.20.1
    react: 0.0.0-experimental-6a589ad71 => 0.0.0-experimental-6a589ad71
    react-dom: 0.0.0-experimental-6a589ad71 => 0.0.0-experimental-6a589ad71
    typescript: ~4.2 => 4.2.4

[Skn0tt]

Seems very much related to blitz-js/blitz#2243