Linting svg tag function input

As far as I can see, this plugin does not further lint the `svg` function input from `lit`.
But the rules that apply to the `html` syntax should also be appliable for `svg` from my point of view.

When looking at the code, then it seems to me that getting it to work at all, would require to not only check for `html`, but also for `svg`:
```ts
if (
node.type === 'TaggedTemplateExpression' &&
node.tag.type === 'Identifier' &&
['svg', 'html'].some(tag => tag === node.tag.name)
) {
```

Of course there is more to it, as it should be configurable if a rule should apply for both or only one.
Furthermore, I have not tested it, so this might not even work.

Is there any interest in extending `eslint-plugin-lit` to also lint code like:
```
const createElement = (chars: string): SVGTemplateResult => svg`
${chars}
`;
```
> source: https://lit.dev/tutorials/svg-templates/