Bump glib from 0.14.8 to 0.15.12

[dependabot[bot]]

Bumps glib from 0.14.8 to 0.15.12.

Release notes

Sourced from glib's releases.

0.15.12

Ben Kimock (1):
      Fix off-by-one in GString::from (and missing null)
Bilal Elmoussaoui (3):
CI: remove -sys conditions tests for windows
gdk_pixbuf: opt-in for gi-docgen
CI: update the gh-package job
Jason Francis (13):
glib: allow unused imports in gobject::auto
cairo: restrict pdf tests to only emit PDF 1.5
Port Dockerfile to fedora rawhide and use system deps from git
ci: Bump versions in image workflow
image: Don't build gdk-pixbuf tests
ci: Bump versions in image workflow
ci: push image to github container repository
dockerfile: disable gdk-pixbuf man pages
ci: add toplevel repo to safe.directory when running checker
ci: bump some more action versions
ci: use set-safe-directory for gtk-rs/checker checkout
Revert "ci: use set-safe-directory for gtk-rs/checker checkout"
ci: don't build full gtk in windows ci
Matteo Biggio (5):
glib: add missing emit_by_name methods
SocketAddressEnumerator: next return value should be nullable
translate.rs: free the container memory also when the container is empty
gstring: implement AsRef<Path> for GString and GStr
ProcessLauncher: close method should be available on unix only
Maximiliano Sandoval R (4):
Fix GBindingGroup bindings
binding_group: Correct doc for build
binding_group: Add test
Use RefCell::take() when possible
Mițca Dumitru (3):
cairo: Add safety docs for low hanging fruits
gio: Add safety docs for Unix and Win32 streams
glib: Add safety docs for log_writer_default_set_use_stderr
Sebastian Dröge (14):
glib/gio: Implement FusedFuture / FusedStream in some places
Implement FusedIterator for various custom iterators
Fix/silence various new clippy warnings
bindinggroup: Make sure to use NUL-terminated strings for the source_property in all cases
bindinggroup: Fix test by making the binding bidirectional as expected from the test
bindingroup: Pass a String to the transform function instead of a *const u8
</tr></table>

... (truncated)

Commits

• 3247b4f Update versions to 0.15.12
• 5419da9 Merge pull request #721 from sdroege/0.15-backports
• 28106d4 Fix off-by-one in GString::from (and missing null)
• 8c25598 Merge pull request #715 from pbor/backport-param-spec-builders
• 96bf8f9 impl Default for ParamFlags
• d6718d7 reuse new fn in ParamSpecOverride
• 57ea13a fully define a corresponding Builder for each ParamSpec
• d70bb9a add #[track_caller] to assert_param_name
• 8628a19 remove useless from_glib in min_max macro
• 34970a4 add common numeric spec impl, common assert_param_name
• Additional commits viewable in compare view

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