Changes of note:
- Includes the new Annotations API package.
- `wp-polyfill-ecmascript.js` is renamed to `wp-polyfill.js`.
- `strip_dynamic_blocks()` has been removed in favor of `excerpt_remove_blocks()`.
- The PHP block parser is now syncing from the `block-serialization-default-parser` package.
- `do_blocks()` uses the new parser.
- The `do_block` filter has been removed from `do_blocks()`, in favor of a `render_block` filter in `render_block()`.
Also, a little cleanup to `render_block()`. Always normalize `$block['attrs’]` to array in `’render_block’` filter.
Props pento, azaozz.
Merges [43884] and [43888] to trunk.
See #45145, #45190, #45264, #45282.
Built from https://develop.svn.wordpress.org/trunk@44261
git-svn-id: http://core.svn.wordpress.org/trunk@44091 1a063a9b-81f0-0310-95a4-ce76da25c4cd
