ci: update meson

Rebuild the fedora docker image to get the newest meson release and
use pip to install the newest version for MSYS2.

https://bugzilla.gnome.org/show_bug.cgi?id=795711

.gitlab-ci.yml

@@ -1,4 +1,4 @@
-image: ebassi/gitlab-glib:latest
+image: registry.gitlab.gnome.org/gnome/glib/master:v1
 
 stages:
   - build

.gitlab-ci/run-docker.sh

@@ -2,8 +2,10 @@
 
 set -e
 
-sudo docker build --build-arg HOST_USER_ID="$UID" --tag "gitlab-glib" \
+TAG="registry.gitlab.gnome.org/gnome/glib/master:v1"
+
+sudo docker build --build-arg HOST_USER_ID="$UID" --tag "${TAG}" \
     --file "Dockerfile" .
 sudo docker run --rm \
     --volume "$(pwd)/..:/home/user/app" --workdir "/home/user/app" \
-    --tty --interactive "gitlab-glib" bash
+    --tty --interactive "${TAG}" bash

.gitlab-ci/test-msys2.sh

@@ -19,12 +19,15 @@ pacman --noconfirm -S --needed \
     mingw-w64-$MSYS2_ARCH-meson \
     mingw-w64-$MSYS2_ARCH-pcre \
     mingw-w64-$MSYS2_ARCH-python3 \
+    mingw-w64-$MSYS2_ARCH-python3-pip \
     mingw-w64-$MSYS2_ARCH-toolchain \
     mingw-w64-$MSYS2_ARCH-zlib
 
 mkdir -p _ccache
 export CCACHE_BASEDIR="$(pwd)"
 export CCACHE_DIR="${CCACHE_BASEDIR}/_ccache"
+pip3 install --upgrade --user meson
+export PATH="$HOME/.local/bin:$PATH"
 
 meson --werror --buildtype debug _build
 cd _build