ci: Use Meson 1.0.0 on Windows and macOS CI builds

This is a departure from our policy of using the minimum required Meson
version, but I think it might be worth a try to see if it fixes the
persistent intermittent build failures on these platforms due to what
looks like build dependency graph issues.

For example:
 - https://gitlab.gnome.org/GNOME/glib/-/jobs/2579411
 - https://gitlab.gnome.org/GNOME/glib/-/jobs/2578792
 - https://gitlab.gnome.org/GNOME/glib/-/jobs/2579220
 - https://gitlab.gnome.org/pwithnall/glib/-/jobs/2588507

I was looking at trying to diagnose some of these failures in order to
potentially file bugs against Meson, but the first step is really to
test against the latest version of Meson. So here we are.

Crucially, our other CI jobs continue to use the minimum Meson version
required by GLib, so we continue to test that GLib builds with its
minimum dependencies. I do not plan to change that.

Also crucially, this MR continues to use a specific Meson version,
rather than asking `pip` to install the latest available. Doing that
could lead to unexpected regressions in future, and that’s not what
GLib’s CI is meant to be testing for.

Signed-off-by: Philip Withnall <pwithnall@endlessos.org>

.gitlab-ci.yml

@@ -511,7 +511,7 @@ macos:
     CFLAGS: '-Wno-overlength-strings'
   before_script:
     - bash .gitlab-ci/show-execution-environment.sh
-    - pip3 install --user meson==0.60.1
+    - pip3 install --user meson==1.0.0
     - pip3 install --user ninja
     - export PATH=/Users/gitlabrunner/Library/Python/3.7/bin:$PATH
   script:

.gitlab-ci/test-msvc.bat

@@ -12,7 +12,7 @@ for %%x in (%*) do (
 set args=%args:~1%
 
 :: FIXME: make warnings fatal
-pip3 install --upgrade --user meson==0.60.3  || goto :error
+pip3 install --upgrade --user meson==1.0.0  || goto :error
 meson %args% _build || goto :error
 python .gitlab-ci/check-missing-install-tag.py _build || goto :error
 ninja -C _build || goto :error

.gitlab-ci/test-msys2.sh

@@ -26,7 +26,7 @@ CCACHE_BASEDIR="$(pwd)"
 CCACHE_DIR="${CCACHE_BASEDIR}/_ccache"
 export CCACHE_BASEDIR CCACHE_DIR
 
-pip3 install --upgrade --user meson==0.60.3
+pip3 install --upgrade --user meson==1.0.0
 
 PATH="$(cygpath "$USERPROFILE")/.local/bin:$HOME/.local/bin:$PATH"
 DIR="$(pwd)"