tilix 1.9.4 release.

Features:

• Actually install Yaru color scheme
• Give every tab the ${title} (instead of "Default")
• Add option to strip trailing whitespace on paste (#1904)

Bugfixes:

• Fix saving of already saved session
• Add shortcut to "Unselect all"
• Many Meson buildsystem fixes
• Avoid missing the previous command exit code when encoding URLs
• Resolve some D deprecation messages
• Mention powerline/fonts in README
• Avoid calling values() on a shared object
• Update metainfo data
• Drop compat code for older D frontend versions
• Bump minimum VTE version to 0.46
• Remove deprecated Autotools support
• Add release notes, NEWS file, automatic metainfo update
• Update to GtkD 3.9.0

Translations:

• This release contains many localization updates