Press-and-hold accents on macOS do not work

[4e554c4c]

Is your issue REALLY a bug?

• My issue is indeed a bug!
• I am not crazy! I will not fill out this form just to ask a question or request a feature. Pinky promise.

Is there an existing issue for this?

• I have searched the existing issues.

Is this issue related to iced?

• My hardware is compatible and my graphics drivers are up-to-date.

What happened?

In macOS, accents can be input by pressing and holding a vowel key (apple documentation)

I opened the "Todos" example cargo run --package todos and held the 'a' key. No accents appeared.

What is the expected behavior?

An accent window should appear offering various accents.

Version

master

Operating System

macOS

Do you have any log output?

no relevant output