Add `with_suffix()` method

[michaelaye]

Is your feature request related to a problem?

I love how yarl follows the pathlib.Path syntax, so was a bit disappointed to not have a with_suffix() method when I needed it. Could it be added?

Describe the solution you'd like

Similar to pathlib, with_suffix() should take a URL to a file, like:

url = yarl.URL("https://a.b.com/index.html")

and change it to:

url.with_suffix(".md")

-> https://a.b.com/index.md

Describe alternatives you've considered

with_name() works as a workaround, but it's sometimes cumbersome to fish out the name first, and do string ops on it before adding it back to the URL.

Additional context

No response

Code of Conduct

• I agree to follow the aio-libs Code of Conduct

[asvetlov]

The request makes sense.
Please feel free to prepare a patch.
I would say that .suffix attribute should be supported if .with_suffix() is added.