JSON:API Explorer in incompatible with JSON:API Schema alpha-8

Problem

After upgrading JSON:API Schema to version alpha-8 issue was appeared.
Looks like backward compatibility is broken due to this change:
https://git.drupalcode.org/project/jsonapi_schema/-/compare/8.x-1.0-alph...

Workaround

As a possible solution we can specify more strict dependency in composer.json:

"require": {
  "drupal/core": "*",
  "drupal/jsonapi_hypermedia": "*",
  "drupal/jsonapi_schema": "1.0.0-alpha7"
},