Test LTS and latest Qt versions in AppVeyor

.appveyor.yml

@@ -2,7 +2,9 @@ image: Visual Studio 2015
 
 init:
   - cmd: call "C:\Program Files (x86)\Microsoft Visual Studio "%VSVER%".0\VC\vcvarsall.bat" %ARCH%
+  - cmd: qmake --version
 
+# https://www.appveyor.com/docs/windows-images-software/#qt
 environment:
   PATH: '%PATH%;%QTDIR%\bin'
   matrix:
@@ -12,6 +14,9 @@ environment:
     - QTDIR: C:\Qt\5.9\msvc2013_64
       VSVER: 12
       ARCH: x64
+    - QTDIR: C:\Qt\latest\msvc2015_64
+      VSVER: 14
+      ARCH: x64
 
 build_script:
   - cmd: qmake qtpromise.pro

.travis.yml

@@ -21,7 +21,7 @@ install:
 
 before_script:
   - qmake --version
-  - lcov --version
+  - lcov --version && gcov --version
   - gcc --version && g++ --version
 
 script: