Implement lichess.org/games "division" and "accuracy" arguments

[kmike]

Hey! It seems there are some arguments in the Lichess Games API (https://lichess.org/api#tag/Games) which are not supported by the client library. Noticed it because I wanted to use "division" argument; "accuracy" is also missing. It'd be great to add them to the library.

[icp1994]

We should probably support an optional "opts" dict argument to most of the endpoints instead of trying to enumerate all the query params.