Bump gtk from 0.14.3 to 0.15.5

[dependabot[bot]]

Bumps gtk from 0.14.3 to 0.15.5.

Release notes

Sourced from gtk's releases.

0.15.5

Guillaume Gomez (1):
      Fix windows CI
Paolo Borelli (3):
subclass support for GtkEntry
Update gir to the latest 0.15 branch revision
Regenerate
Sebastian Dröge (5):
Add rustfmt.toml to allow some editors to auto-format the code on save
gdkwayland: Fix new clippy warning
gtk: Fix new clippy warning
Update versions to 0.15.5

0.15.4

Jason Francis (1):
      gtk3-macros: Add doc links to glib/gtk items
Sebastian Dröge (6):
Handle empty slices correctly
Update gir-files
gtk: Remove unnecessary overrides
Regenerate
Update versions to 0.15.4

0.15.3

Sebastian Dröge (10):
      Update gir
      Regenerate with latest gir
      Update versions to 0.15.3
      Add various 3.24 version overrides
      Add missing version features to Cargo.toml
      Regenerate
      gtk: Add `Atk.Role` to `manual` to generate some more bindings
      gtk: Depend on glib 0.15.3 for `ThreadGuard` API

0.15.2

No release notes provided.

0.15.1

No release notes provided.

Commits

• 51df5c2 Update versions to 0.15.5
• 7bc2398 Merge pull request #746 from pbor/backport-0.15
• 80d2076 Regenerate
• 07a7f35 Update gir to the latest 0.15 branch revision
• 14fed09 subclass support for GtkEntry
• 1c5ac89 Fix windows CI
• 7b72259 gtk: Fix new clippy warning
• 4452940 gdkwayland: Fix new clippy warning
• 1cd71ae Add rustfmt.toml to allow some editors to auto-format the code on save
• 807522a Update versions to 0.15.4
• Additional commits viewable in compare view

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