Make `elementtiming` and `fetchpriority` optional properties

[yhdgms1]

I see there was an Issue about missing properties, but I suppose they should be optional, because if I do

import type { JSX } from 'solid-js';

type ImgAttrs = JSX.ImgHTMLAttributes<HTMLImageElement>;

const defaultProps = {
  src: 'http://'
} satisfies ImgAttrs;

I get a error that elementtiming and fetchpriority is required

[bniwredyc]

:shipit:

[usmanyunusov]

:(