Add encoding and decoding of item details (quantity/skin/upgrades)

[darthmaim]

encode now takes an object ({id, quantity?, skin?, upgrade1?, upgrade2?}) as second argument to pass the additional item info. Just passing the id still works.

decode will now always return quantity for items, and optional skin, upgrade1 or upgrade2.

[darthmaim]

Now that I commited this I noticed it would be nice if the two upgrade slots were passed/returned as array ({upgrades: [1, 2]} instead of the 2 properties ({upgrade1: 1, upgrade2: 2}) to allow passing a ItemStack from the Api.

[codecov-io]

Codecov Report

Merging #2 into master will not change coverage.
The diff coverage is 100%.

@@          Coverage Diff          @@
##           master     #2   +/-   ##
=====================================
  Coverage     100%   100%           
=====================================
  Files           1      1           
  Lines          31     71   +40     
=====================================
+ Hits           31     71   +40

Impacted Files	Coverage Δ
src/index.js	100% <100%> (ø)	⬆️

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[queicherius]

First off: Thank you! 💓

I agree that an array of upgrades would be more intuitive, then it mirrors the API. Gonna wait for that here.

Out if interest, is it possible to encode infusions too? I remember them not showing up in the game a while ago, but I have no idea how it is handled now.

If you have the motivation, you could also update the README for the new input format, if not that's cool too and I'll do it after the merge.

[darthmaim]

You can't encode Infusions :(

Will update the README too.

[darthmaim]

Should be good now 👍

[queicherius]

Nice! 👍 LGTM.