[gobject-introspection] build: require meson 0.50.1

[Christoph Reiter <creiter src gnome org>]

commit 2e9f0a4fc9c7f1ba4583eeb76859bbab8cd7c702
Author: Christoph Reiter <reiter christoph gmail com>
Date:   Fri Nov 8 16:41:29 2019 +0100

    build: require meson 0.50.1
    
    See !186

 .gitlab-ci.yml                 | 2 +-
 .gitlab-ci/Dockerfile          | 2 +-
 .gitlab-ci/run-docker.sh       | 2 +-
 .gitlab-ci/test-msvc.bat       | 2 +-
 .gitlab-ci/test-msys2-meson.sh | 2 +-
 meson.build                    | 2 +-
 6 files changed, 6 insertions(+), 6 deletions(-)
---
diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index f28c3b67..9e62b41a 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -2,7 +2,7 @@ stages:
   - build
   - deploy
 
-image: registry.gitlab.gnome.org/gnome/gobject-introspection:v5
+image: registry.gitlab.gnome.org/gnome/gobject-introspection:v6
 
 cache:
   paths:
diff --git a/.gitlab-ci/Dockerfile b/.gitlab-ci/Dockerfile
index 0d9d4268..0dec6700 100644
--- a/.gitlab-ci/Dockerfile
+++ b/.gitlab-ci/Dockerfile
@@ -48,7 +48,7 @@ RUN dnf -y install \
     zlib-devel \
  && dnf clean all
 
-RUN pip3 install meson==0.49.2
+RUN pip3 install meson==0.50.1
 
 ARG HOST_USER_ID=5555
 ENV HOST_USER_ID ${HOST_USER_ID}
diff --git a/.gitlab-ci/run-docker.sh b/.gitlab-ci/run-docker.sh
index 2334edad..5d29002c 100755
--- a/.gitlab-ci/run-docker.sh
+++ b/.gitlab-ci/run-docker.sh
@@ -2,7 +2,7 @@
 
 set -e
 
-TAG="registry.gitlab.gnome.org/gnome/gobject-introspection:v5"
+TAG="registry.gitlab.gnome.org/gnome/gobject-introspection:v6"
 
 sudo docker build --build-arg HOST_USER_ID="$UID" --tag "${TAG}" \
     --file "Dockerfile" .
diff --git a/.gitlab-ci/test-msvc.bat b/.gitlab-ci/test-msvc.bat
index b30bae5e..a2ee44b2 100644
--- a/.gitlab-ci/test-msvc.bat
+++ b/.gitlab-ci/test-msvc.bat
@@ -9,7 +9,7 @@ py -3 -c "import urllib.request, sys; urllib.request.urlretrieve(*sys.argv[1:])"
 
 SET PATH=%CD%;%CD%\win_flex_bison;%PATH%
 
-pip3 install --upgrade --user meson==0.49.2 || goto :error
+pip3 install --upgrade --user meson==0.50.1 || goto :error
 meson _build || goto :error
 ninja -C _build || goto :error
 
diff --git a/.gitlab-ci/test-msys2-meson.sh b/.gitlab-ci/test-msys2-meson.sh
index 9c795d33..9f145e5b 100644
--- a/.gitlab-ci/test-msys2-meson.sh
+++ b/.gitlab-ci/test-msys2-meson.sh
@@ -31,7 +31,7 @@ pacman --noconfirm -S --needed \
 export CCACHE_BASEDIR="${CI_PROJECT_DIR}"
 export CCACHE_DIR="${CCACHE_BASEDIR}/_ccache"
 
-pip3 install --upgrade --user meson==0.49.2 flake8
+pip3 install --upgrade --user meson==0.50.1 flake8
 export PATH="$HOME/.local/bin:$PATH"
 
 export CFLAGS="-Werror"
diff --git a/meson.build b/meson.build
index 6e704776..496813e9 100644
--- a/meson.build
+++ b/meson.build
@@ -1,6 +1,6 @@
 project('gobject-introspection', 'c',
   version: '1.63.1',
-  meson_version: '>= 0.49.2',
+  meson_version: '>= 0.50.1',
   default_options: [
     'warning_level=1',
     'buildtype=debugoptimized',