Updating @apidevtools/json-schema-ref-parser to v15.

[dennisoelkers]

Description

This PR is updating the @apidevtools/json-schema-ref-parser dependency to v15.

Motivation and Context

The purpose of this is not only general maintenance, but it is also fixing an issue, that when the HttpResolver is used, errors (like the hardcoded 5s timeout) will not bubble up.

How Has This Been Tested?

Screenshots (if appropriate):

Types of changes

• No code changes (changes to documentation, CI, metadata, etc)
• Dependency changes (any modification to dependencies in package.json)
• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)

Checklist:

• My code follows the code style of this project.
• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• I have added tests to cover my changes.
• All new and existing tests passed.

[dennisoelkers]

Thanks for the swift review/approval and help, @wparad!