[gedit-plugins/flake8] Update .gitlab-ci.yml

[Jordi Mas <jmas src gnome org>]

commit 2fa2fbe69420d43e3ffc128065f1e86ad06a816e
Author: Jordi Mas <jmas softcatala org>
Date:   Thu May 16 11:38:58 2019 +0000

    Update .gitlab-ci.yml

 .gitlab-ci.yml | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)
---
diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index c5ff38c..13f9f05 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -4,6 +4,11 @@ stages:
     - build
     - check
 
+before_script:
+    - export DEBIAN_FRONTEND=noninteractive
+    - apt-get update -y
+    - apt-get install python3 python3-pip python3-dbus
+
 build:
   stage: build
   before_script:
@@ -13,7 +18,7 @@ build:
     - apt-get install libgit2-glib-1.0-dev libglib2.0-dev libgtk-3-dev -y
     - apt-get install libgtksourceview-4-dev libgucharmap-2-90-dev libpeas-dev -y
     - apt-get install valac libvte-2.91-dev libzeitgeist-2.0-dev gedit-dev -y
-    - apt-get install python3 python3-pip python3-dbus python-dbus-dev python3-gi appstream -y
+    - apt-get install python3-dbus python-dbus-dev python3-gi appstream -y
     - apt-get install meson ninja-build -y
 
   script: