Add ability to remove a spinner from the spinners list

[jbcarpanelli]

The idea is to implement a new method called remove that receives a spinner reference name as argument and removes that spinner from the list, and thus should not be printed again in the terminal If no reference is given, the method call does nothing.

Example usage:

const spinnies = new Spinnies();
spinnies.add('spinner-1');
spinnies.add('spinner-2');
spinnies.add('spinner-3');
setTimeout(() => {
  spinnies.remove('spinner-2');
}, 3000); // => should remove the second spinner and not print it again. 

[SweetMNM]

I implemented this feature in my fork.
I'm working on more features, then i will open a PR.

[jbcarpanelli]

Hey @SweetMNM! Thanks for tackling this! Looking forward to reviewing that PR 🙂

[jbcarpanelli]

Hey @SweetMNM, I noticed you have been improving spinnies a lot in your fork! Do you plan to create a PR soon?

[SweetMNM]

Yes, I just want to finish implementing custom statuses, hide and unhide spinners, write some more tests and maybe some other features before I open the PR..