Remove `fs-extra` dependency

[serbanghita]

@stsvilik I looked over the way we use "fs-extra": "^7.0.0", package and I believe we can get rid of the dependency by having a bunch of local functions in src/utils based on fs native module. Let me know your thoughts on this.

[stsvilik]

Thats definitely possible - will need to promisify native fs and some refactoring around checking for log files writeability.

[seanpoulter]

Node 16 shipped with fs/promises. This should be easy if it is still something you'd like to do.
What version of Node.js do you expect to support? Can we add that in engines.node in package.json?

[christian-bromann]

+1 on this change 👍

[christian-bromann]

Please not that there is a rewrite on going in #126, so let's coordinate this with the work done by @dons20

[seanpoulter]

It also looks like we don't have GitHub workflows configured. Let me know if there are any incremental changes you'd like me to make to help. If I don't hear anything I'll wait for #126.