As a prospective Spectral user, I have non-HTTP URLs

[CorbinSimpsonDaedalus]

Hi! I'm evaluating Spectral and found this. It seems like isURL is a bit too restrictive, only accepting HTTP and HTTPS URLs.

User Story Description

As a prospective Spectral user, I would like isURL to accept any URL protocol, because my existing services have non-HTTP URLs.

Acceptance Criteria

• Spectral accepts non-HTTP examples of URLs in OpenAPI specifications

For example:

schema:
  type: string
  format: url
example: ftp://ftp.example.com/

Sprint Ready Checklist

• Acceptance criteria defined
• Team understands acceptance criteria
• Team has defined solution / steps to satisfy acceptance criteria
• Acceptance criteria is verifiable / testable
• External / 3rd Party dependencies identified