Attempt at getting TravisCI to compile for all three operating systems

.travis.yml

@@ -1,8 +1,16 @@
 language: cpp
+
+branches:
+  except:
+    - # Do not build tags that we create when we upload to GitHub Releases
+    - /^(?i:continuous)/
+
+matrix:
+   include
+      - os: linux
+        dist: xenial
         compiler: gcc
         sudo: require
-dist: xenial
-
         before_install:
            - sudo add-apt-repository ppa:beineri/opt-qt-5.12.3-xenial -y
            - sudo apt-get update -qq
@@ -26,7 +34,21 @@ after_success:
            - wget -c https://github.com/probonopd/uploadtool/raw/master/upload.sh
            - bash upload.sh SavvyCAN*.AppImage*
   
-branches:
-  except:
-    - # Do not build tags that we create when we upload to GitHub Releases
-    - /^(?i:continuous)/
+      - os: osx
+        osx_image: xcode10
+        before_install:
+           - brew install qt5
+           - brew link qt5 --force
+        script:
+           - qmake CONFIG+=release -spec macx-xcode SavvyCAN.pro
+           - xcodebuild
+           - macdeployqt Release/SavvyCAN.app -dmg
+      - os: windows
+        before_install:
+           - dir C:/Program\ Files\ \(x86\)/Windows\ Kits/10/bin/10.0.17134.0/x64
+           - cmd.exe /C 'cd && "C:\Program Files (x86)\Microsoft Visual Studio\2017\BuildTools\VC\Auxiliary\Build\vcvarsall.bat" x86 && cd && cd "C:/Users/travis/build/braindef/jamulus" && dir'
+           - curl -vLO http://download.qt.io/official_releases/online_installers/qt-unified-windows-x86-online.exe
+           - "./qt-unified-windows-x86-online.exe --verbose --script qt-installer-windows.qs"
+           - ls -la C:/Qt/5.12.3/msvc2017/bin/qtenv2.bat
+        script:
+           - cmd.exe /C 'cd && "C:\Qt\5.12.3\msvc2017\bin\qtenv2.bat" && cd && "C:\Program Files (x86)\Microsoft Visual Studio\2017\BuildTools\VC\Auxiliary\Build\vcvarsall.bat" x86 && cd && qmake CONFIG+=RELEASE SavvyCAN.pro && nmake'