build(deps): update gtk4 requirement from 0.6.6 to 0.7.3

[dependabot]

Updates the requirements on gtk4 to permit the latest version.

Release notes

Sourced from gtk4's releases.

0.7.3

• gdk: Make RGBA::new const
• gdk: Add with_* constructors for RGBA
• gsk: Add builder for Stroke
• gtk/gsk: Support new GTK 4.14 APIs

Changelog

Sourced from gtk4's changelog.

Change Log

[Unreleased]

[0.6.6]

Bilal Elmoussaoui:

• gtk: Implement convenience traits for StringObject
• gtk: Move gtk::StyleContext::add_provider_for_display & gtk::StyleContext::remove_provider_for_display functions outside of gtk::StyleContext type as it was deprecated in GTK 4.10 causing a wrong deprecation warning. Switch to gtk::style_context_add_provider_for_display & gtk::style_context_remove_provider_for_display instead.

Yuri Izmer:

• gtk4-macros: Extend blueprint support to files

#[derive(Debug, Default, gtk::CompositeTemplate)]
#[template(file = "src/my_widget.blp")] // relative to the project directory
pub struct MyWidget {
    #[template_child]
    pub label: TemplateChild<gtk::Label>,
    #[template_child(id = "my_label2")]
    pub label2: gtk::TemplateChild<gtk::Label>,
}

[0.6.5]

Fabio Valentini:

• gtk4-macros: enable default features of syn

[0.6.4]

Bilal Elmoussaoui:

• gtk: Add missing guard to AccessibleRoleToggleButton

[0.6.3]

Bilal Elmoussaoui:

• gtk/subclass: Adapt per Accessible transfer type changes
• Bump GTK requirement for v4_10 feature
• Fix nightly clippy warnings
• Fix docs generation

Maximiliano Sandoval R:

... (truncated)

Commits

• cb4dde9 Bump version to 0.7.3
• 96436d3 gsk: Generate PathMeasure
• 853668b Regenerate with latest gir/gir-files
• 0f4683a Update gir/gir-files submodules
• 6d1c8ac gsk: Add builder for Stroke
• a6a8538 gdk: Avoid duplicate code on RGBA constants
• 8d2fb44 gdk: Simplify RGBABuilder code
• 274c3a9 gsk: Silence new warning
• ac1f359 gsk: Adapt to changed Path.foreach
• c7d9a6d gsk: Adapt to PathPoint.get_curvature api changes
• Additional commits viewable in compare view

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[dependabot]

Superseded by #10.