Switch from URI Templates to URI Pattern

[dunglas]

There is a new proposal for a standard dedicated to matching URLs: https://developer.mozilla.org/en-US/docs/Web/API/URL_Pattern_API

If it is adopted, it will better fit the Mercure use case than how we currently hijack the URI Template spec.

[stale]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.

[dunglas]

We currently lack a Go library implementing the URLPattern spec.

The algorithm to implement is fully described in the spec.

Some useful resources to implement this:

• Test data used by Chrome, Deno, and the JS polyfill
• Rust library from Deno
• JS polyfill
• C++ library from Chrome

Similar code that may be adapted to conform to the spec:

• path-to-regexp (Go port)
• Go Fiber's path