Travis: Use bionic-gcc and xenial-clang environments

Signed-off-by: Lukas Holecek <hluk@email.cz>

.travis.yml

-dist: trusty
 sudo: required
 language: cpp
 
@@ -8,15 +7,19 @@ matrix:
       compiler: clang
 
     - os: linux
+      dist: bionic
       compiler: gcc
       env:
         - COMPILER=g++
         - GCOV=gcov
 
     - os: linux
+      dist: xenial
       compiler: clang
       env:
         - COMPILER=clang++
+        # Disable encryption tests because exporting GPG key asks for password.
+        - COPYQ_TESTS_SKIP_ITEMENCRYPT=1
 
 cache:
     apt: true

utils/travis/install-linux.sh

@@ -26,6 +26,7 @@ packages=(
     gnupg2
 
     # tests
+    xvfb
     openbox
 )
 

utils/travis/script-linux.sh

@@ -35,9 +35,9 @@ DISPLAY="" ./copyq --version
 DISPLAY="" ./copyq --info
 
 # Start X11 and window manager.
-export DISPLAY=:99.0
-sh -e /etc/init.d/xvfb start
-sleep 4
+export DISPLAY=':99.0'
+Xvfb :99 -screen 0 1280x960x24 &
+sleep 5
 openbox &
 sleep 8