upgrade apexcharts

[oliver-sanders]

Upgrade to the last good version of apexcharts.

The licence was still MIT @ 4.7.0: https://github.com/apexcharts/apexcharts.js/blob/v4.7.0/LICENSE

After which it went evil, hence #1978 cannot be merged.

@ChrisPaulBennett, please can you review this and make sure the upgrade hasn't broken anything, if changes are needed, push them to this branch. @MetRonnie noted panning issues (#1978 (comment)), although, having tested, I'm not sure panning works on master either?

Check List

• I have read CONTRIBUTING.md and added my name as a Code Contributor.
• Contains logically grouped changes (else tidy your branch by rebase).
• Does not contain off-topic changes (use other PRs for other changes).
• Applied any dependency changes to both setup.cfg (and conda-environment.yml if present).
• Tests are included (or explain why tests are not needed).
• Changelog entry included if this is a change that can affect users
• Cylc-Doc pull request opened if required at cylc/cylc-doc/pull/XXXX.
• If this is a bug fix, PR should be raised against the relevant ?.?.x branch.

[MetRonnie]

Panning in the Gantt chart is still broken, might be apexcharts/apexcharts.js#4975

To reproduce: scroll with mouse wheel over the gantt view. The chart disappears entirely!

[oliver-sanders]

Yep - #2256, frustrating.

Guessing it's no worse than before?

[MetRonnie]

Not reproduced that before other than when apexcharts is upgraded.

Edit: reproduced on master by deliberately zooming in order to make the data go off the edges. But on this branch it's a lot worse as it happens on the slightest scroll

[oliver-sanders]

This is probably going to serve as the blocker PR for all apexcharts upgrade.

• Can't move to v4 because of bugs.
• Can't move to v5 because of license.