Use master SDK

.gitlab-ci.yml

@@ -13,9 +13,9 @@ flatpak:
 
   script:
   - apk update && apk add flatpak-builder
-  - flatpak remote-add --if-not-exists flathub https://flathub.org/repo/flathub.flatpakrepo
-  - flatpak install -y flathub org.gnome.Platform 41
-  - flatpak install -y flathub org.gnome.Sdk 41
+  - flatpak remote-add --if-not-exists gnome-nightly https://nightly.gnome.org/gnome-nightly.flatpakrepo
+  - flatpak install -y flathub org.gnome.Platform master
+  - flatpak install -y flathub org.gnome.Sdk master
   - flatpak-builder --stop-at=${FLATPAK_MODULE} app ${MANIFEST_PATH}
   - flatpak build app meson --prefix=/app ${MESON_ARGS} _build
   - flatpak build app ninja -C _build install

build-aux/uk.me.bcowan.Rugby.yml

@@ -4,7 +4,7 @@
 
 app-id: uk.me.bcowan.Rugby
 runtime: org.gnome.Platform
-runtime-version: "41"
+runtime-version: "master"
 sdk: org.gnome.Sdk
 command: rugby
 

data/interface.ui

@@ -24,6 +24,9 @@
     <property name="title" translatable="yes">Rugby</property>
     <property name="default-height">600</property>
     <property name="default-width">400</property>
+    <style>
+        <class name="devel"/>
+    </style>
     <child>
       <object class="GtkScrolledWindow">
         <child>