parser-icu does not handle HTML tags

[pboguslawski]

Using HTML tags in translations makes parser-icu throw

500

INVALID_TAG

SyntaxError: INVALID_TAG
    at Function.parse [as __parse] (/@fs/tmp/lib/node_modules/@formatjs/icu-messageformat-parser/lib/index.js:31:21)
    at new IntlMessageFormat (/@fs/tmp/lib/node_modules/intl-messageformat/lib/src/core.js:136:42)
    at Object.parse (/@fs/tmp/lib/node_modules/@sveltekit-i18n/parser-icu/dist/index.js:1:154)
    at O (/@fs/tmp/lib/node_modules/@sveltekit-i18n/base/dist/index.js:1:1261)
    at /@fs/tmp/lib/node_modules/@sveltekit-i18n/base/dist/index.js:1:4065
    at index.svelte:21:10
    at Object.$$render (/@fs/tmp/lib/node_modules/svelte/internal/index.mjs:1770:22)
    at Object.default (root.svelte:43:39)
    at eval (/src/routes/__layout.svelte:29:41)
    at Object.$$render (/@fs/tmp/lib/node_modules/svelte/internal/index.mjs:1770:22)

To repoduce: setup example as described on https://github.com/sveltekit-i18n/lib/tree/master/examples/parser-icu and change

"plural": "You have {value, plural, =0 {no photos.} =1 {one photo.} other {# photos.}}",

to

"plural": "<a href=\"https://example.com/\">You</a> have {value, plural, =0 {no photos.} =1 {one photo.} other {# photos.}}",

in src/lib/translations/en/content.json and change

<p>{$t('content.plural', { value: $number })}</p>

to

<p>{@html $t('content.plural', { value: $number })}</p>

in src/routes/index.svelte.

[pboguslawski]

Works fine when quoted like this:

"plural": "'<a href=\"https://example.com/\">'You'</a>' have {value, plural, =0 {no photos.} =1 {one photo.} other {# photos.}}",