build(deps): update eframe requirement from 0.26 to 0.29

Updates the requirements on [eframe](https://github.com/emilk/egui) to permit the latest version.
- [Release notes](https://github.com/emilk/egui/releases)
- [Changelog](https://github.com/emilk/egui/blob/master/CHANGELOG.md)
- [Commits](emilk/egui@0.26.0...0.29.0)

---
updated-dependencies:
- dependency-name: eframe
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <[email protected]>

Cargo.toml

@@ -19,7 +19,7 @@ egui27 = { version = "0.27", package = "egui", default-features = false, optiona
 egui28 = { version = "0.28", package = "egui", default-features = false, optional = true }
 
 [dev-dependencies]
-eframe = "0.26"
+eframe = "0.29"
 
 [features]
 default = ["egui26"]