State/Nonce size is too small for Login.Gov
I am trying to setup [Strapi](https://github.com/strapi/strapi) with a new auth provider ([Login.gov](https://login.gov/)). They use grant for auth. The issue I am currently having is that Login.gov wants state and nonce to be at least 32 characters in length. I know this is probably an edge case but is there any reason this 10 couldn't be changed to 32? 

https://github.com/simov/grant/blob/c8e036d35d73de2344cc715bed076cc0a2315139/lib/config.js#L147