fix(svg): encode HTML special characters when generating SVG string

[plainheart]

Brief Information

This pull request is in the type of:

• bug fixing
• new feature
• others

What does this PR do?

Fix the generated SVG string may be broken if it contains special HTML characters. See also ecomfe/zrender#935.

Fixed issues

• Resolves [Bug]The name of the series in the option contains label characters such as "<",">", which causes the generated svg to render incorrectly #17399

Document Info

One of the following should be checked.

• This PR doesn't relate to document changes
• The document should be updated later
• The document changes have been made in apache/echarts-doc#xxx

Misc

ZRender Changes

• This PR depends on ZRender changes (fix(svg): encode HTML when converting vnode to string. ecomfe/zrender#935).

Related test cases or examples to use the new APIs

test/visualMap-pieces.html

Others

Merging options

• Please squash the commits into a single one when merging.

Other information

[echarts-bot]

Thanks for your contribution!
The community will review it ASAP. In the meanwhile, please checkout the coding standard and Wiki about How to make a pull request.

The pull request is marked to be PR: author is committer because you are a committer of this project.

This PR depends on ZRender changes. Please update the ZRender dependency to the latest nightly version including this change, which takes place everyday at 8:00 UTC (16:00 Beijing Time).
You can use npm i zrender@npm:zrender-nightly@dev to update package.json.
If you have any question about this, please leave a comment and we will give you extra help on this.

[plainheart]

@pissang Updated the zrender to the latest nightly version just now. :)

[echarts-bot]

Congratulations! Your PR has been merged. Thanks for your contribution! 👍