Use @aero/centra or centra instead of node-fetch

[MeerBiene]

Is your feature request related to a problem? Please describe.

I'm always frustrated when I want to install a package and it comes with node-fetch and therefore unneded clutter. Please use something more lightweight like centra or the aero fork of it.

Describe the solution you'd like

Use something more lightweight like centra or the aero fork of it. (https://www.npmjs.com/package/@aero/centra)

Describe alternatives you've considered

If you guys want i can make a pull request and implement it for you.

[maybeanerd]

If you can open a PR, it'd be highly appreciated!

before you do though, maybe some background info:
in the very first versions of blapi, I actually built it without any fetch library - just the included functions from node.js.
IMO, that is the most lightweight way to do it. After some time and others giving feedback though, we changed it to node-fetch, simply because of error handling and other "wrappings" that would just not really have existed in the bare-bones approach.
If centra is a solution that is more lightweight than node-fetch and also has all the wrapper stuff going on that makes the use of a lib more convenient and safe than going full node.js functionalities, I think it's a good idea to switch. If it doesn't have those functionalities, it might be better to either stay with node-fetch (or another one, IDRC about the specific lib) or to rethink if going with the node.js included fetching would be the best call.

[MeerBiene]

Thanks for sharing your thoughts and the insights. Will do some testing to see if the behavior changes and all functionality is given.

[MeerBiene]

Closed in #70