Fix ECharts 6.0.0 incompatibility

[joshkel]

Fixes #556

This change is incompatible with ECharts pre 6.0.0.

[ethannguyen276]

Hi, can we proritise this PR?

[ToppDev]

Hey, I would also like this PR merged.

I tried this PR and ran into some issues described in lublak/typst-echarm-package#10 (comment) related to missing file extensions .js in the imports

just a repeat of the error:

✘ [ERROR] Could not resolve "zrender/lib/animation/Animator"

node_modules/echarts-gl/lib/util/animatableMixin.js:1:21:
  1 │ import Animator from 'zrender/lib/animation/Animator';
    ╵                      ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

The module "./lib/animation/Animator" was not found on the file system:

node_modules/zrender/package.json:88:11:
  88 │     "./*": "./*"
     ╵            ~~~~~

Import from "zrender/lib/animation/Animator.js" to get the file
"node_modules/zrender/lib/animation/Animator.js":

node_modules/echarts-gl/lib/util/animatableMixin.js:1:52:
  1 │ import Animator from 'zrender/lib/animation/Animator';
    │                                                     ^
    ╵                                                     .js

You can mark the path "zrender/lib/animation/Animator" as external to exclude it from the bundle,
which will remove this error and leave the unresolved path in the bundle.

As I am not a professional in JS I am not sure if this is really an issue or I am too dumb to use npm. But maybe worth considering before merging.