Missing EBML element in schema.js

[jboulay]

Hi,

Since the last version of chrome (92.0.4515.107) the webm file generated with MediaRecording API use Matroska Element 0x55b0 to 0x55bd.

These element are not in schema.js and that cause issues. Is there a reason for that ?

The problem is also described in legokichi/ts-ebml#33

[chrmcg]

I've just created #9 to update schema.js to Matroska v4, which might help with this.