ci: Use bookworm for online builds

PureOS carries rather old versions of rustc and cargo. Attempting to build fails at transitive dependencies, and it's easier to upgrade the compiler than to track down and hold offending depencencies as they come.

.gitlab-ci.yml

@@ -23,12 +23,14 @@ build_docs:
       - $PKG_ONLY == "1"
 
 build_meson:
+  image: debian:bookworm
   stage: build
   artifacts:
     paths:
       - _build
     expire_in: 3h
   script:
+    - mv debian/control-newer debian/control
     - apt-get -y build-dep .
     - meson . _build/ -Ddepdatadir=/usr/share --werror
     - ninja -C _build install
@@ -96,6 +98,7 @@ build_deb:future:
     - cp ../*.deb .
 
 build_reference:
+  image: debian:bookworm
   stage: build
   needs:
     - job: build_meson
@@ -124,11 +127,13 @@ test_lintian:
       - $PKG_ONLY == "1"
 
 test:
+  image: debian:bookworm
   stage: test
   needs:
     - job: build_meson
       artifacts: true
   script:
+    - mv debian/control-newer debian/control
     - apt-get -y build-dep .
     - apt-get -y install clang-tidy
     - ninja -C _build test

Cargo.deps.online

@@ -2,7 +2,3 @@
 [patch.crates-io]
 # Dependency was yanked, but gio 0.7 needs it.
 fragile = { git = "https://source.puri.sm/dorota.czaplejewicz/fragile.git", tag = "0.3.0" }
-
-# Override automatic upgrade done in serde_yaml.
-[dependencies.indexmap]
-version = "1.8.*"