build static version of Qt; use the new LTS

.travis.yml

@@ -1,27 +1,24 @@
 language: cpp
 compiler: gcc
 sudo: require
-dist: trusty
+dist: xenial
 
 before_install:
-  - sudo add-apt-repository ppa:beineri/opt-qt-5.10.1-trusty -y
   - sudo apt-get update -qq
 
 install:
-  - sudo apt-get -y install qt510base
-  - source /opt/qt*/bin/qt*-env.sh
-  - # sudo bash build_resources/build_qt_static.sh 
+  - sudo bash build_resources/build_qt_static.sh 
 
 script:
   - export VERSION=$(git rev-parse --short HEAD)
   - export APPIMAGE_UPDATER_VERSION=1-alpha
   - export APPIMAGE_UPDATER_COMMIT=$(git rev-parse --short HEAD)
   - export APPIMAGE_UPDATER_BUILD_NO=$TRAVIS_BUILD_NUMBER 
   - export APPIMAGE_UPDATER_BUILD_TIME=$(date) 
-  - qmake . # /usr/local/Qt-5.12.8/bin/qmake .
+  - /usr/local/Qt-5.12.8/bin/qmake .
   - make -j$(nproc)
   - cd cli
-  - qmake . # /usr/local/Qt-5.12.8/bin/qmake .
+  - /usr/local/Qt-5.12.8/bin/qmake .
   - make -j$(nproc)
   - mkdir -p appdir/usr/bin ; strip appimageupdater ; cp appimageupdater appdir/usr/bin/
   - cd ..