getNextMove needs to be async

[thinktt]

I've been enjoying playing with this library. I love the simplicity of it. I was going to plug an engine in to it but I noticed something that appears to be an issue. Shouldn't the getNextMove be async? If we call an engine from this method aren't we blocking the thread and the strean from lichess?

Am I missing something here? I haven't looked into the code to deeply.

[thinktt]

I figured this out, it's fairly trivial to change it to async. I can think of some reasons why you might not want to I guess, but seems like if you wanted bot-o-tron to play multiple game at once it could be an issue unless I'm not understanding how this is built.