Bump gio from 0.20.6 to 0.20.12

[dependabot]

Bumps gio from 0.20.6 to 0.20.12.

Release notes

Sourced from gio's releases.

0.20.12

Carlos Martín Nieto:
      examples: add some docs to the example using the Properties macro
      glib-macros: Properties: copy property docs to getter
      glib-macros: Properties: allow setting getter and setter docs
      glib-macros: Properties: copy over the doc comments more elegantly
      glib-macros: extend `Properties` docs with the getter-setter docs
      glib-macros: add some generic comments for property notifications
Sebastian Dröge:

glib: Remove nonsense comments about glib::Slice pointers being NULL-terminated

glib: Make sure that empty glib::StrV / glib::PtrSlice returns a valid pointer

Fix new nightly warning about confusing lifetime flows

Update Cargo.lock

tests: Add Cargo.lock

Update version to 0.20.12
nozwock:

Clarify usage requirement of Properties macro for enum types

Link to Properties macro section on usage with Enum derived enums

Derive Default for MyEnum in example of Properties macro

0.20.11

Sebastian Dröge:
      Update version to 0.20.11
Sophie Herold:

Revert "gio: manually implement content_type_guess"

0.20.10

Bilal Elmoussaoui:
      ignore typ typo
      gobject: Work around wrongly added v2_82 feature
      glib: Implement Deref/DerefMut for ThreadGuard
David Hewitt:

gio: manually implement content_type_guess
Leo Schaefer:

Fix bug in bindings of shape_full and shape_with_flags

Use as_ptr and bring shape_full and shape_with_flags into the same format
Sebastian Dröge:

Update gir

Update gir-files

</tr></table>

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Commits

• 337dde5 Update version to 0.20.12
• ffe84f9 Merge pull request #1744 from sdroege/0.20-backports
• 85af5ec tests: Add Cargo.lock
• c6e5cea Update Cargo.lock
• ad487aa Fix new nightly warning about confusing lifetime flows
• 02baaed Derive Default for MyEnum in example of Properties macro
• cce148b glib: Make sure that empty glib::StrV / glib::PtrSlice returns a valid po...
• 311cb1f glib: Remove nonsense comments about glib::Slice pointers being NULL-term...
• 3baeb18 Link to Properties macro section on usage with Enum derived enums
• af720cb Clarify usage requirement of Properties macro for enum types
• Additional commits viewable in compare view

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