fix(legend): item hideInLegend prop

[nickofthyme]

Summary

Fix hideInLegend prop to work again

fix #306 -- I saw another issue for this a few weeks back but couldn't find it.

Before

After

Checklist

• Unit tests were updated or added to match the most common scenarios
• Each commit follows the convention

[codecov-io]

Codecov Report

Merging #307 into master will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #307   +/-   ##
=======================================
  Coverage   98.17%   98.17%           
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  Files          37       37           
  Lines        2684     2684           
  Branches      632      632           
=======================================
  Hits         2635     2635           
  Misses         44       44           
  Partials        5        5

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[markov00]

Code LGTM

[markov00]

I saw another issue for this a few weeks back but couldn't find it.
was Caroline on slack. I don't think we have other issues for that.

BTW I've a linked feature request:
hideInLegend option for splitted series :D This one works with the full component, but a series component can made up of multiple splitted series, that someone want to hide independently on the legend. I think that should go with the whole customEverything ideas here #298 (comment)

[nickofthyme]

@markov00 sounds good 👍

[markov00]

🎉 This PR is included in version 9.0.4 🎉

The release is available on:

• GitHub release
• npm package (@latest dist-tag)

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