Use v0.4 display-interface

[bugadani]

Hi! Thank you for helping out with SSD1306 development! Please:

• Check that you've added documentation to any new methods
• Rebase from master if you're not already up to date
• Add or modify an example if there are changes to the public API
• Add a CHANGELOG.md entry in the Unreleased section under the appropriate heading (Added, Fixed, Changed, etc)
• Run rustfmt on the project with cargo fmt --all - CI will not pass without this step
• Check that your branch is up to date with master and that CI is passing once the PR is opened

PR description

Submitted this separately to make the changelog more tidy.

[jamwaffles]

A tiny nit, otherwise LGTM

[therealprof]

LGTM

[jamwaffles]

Sweet, thanks!