added OpenCV-dependency to AppVeyor/Travis CI-builds

appveyor.yml

@@ -72,6 +72,8 @@ install:
   - echo "BUILD ID Qt%QTVER%_%QTABI%_%APPVEYOR_BUILD_VERSION%_%CONFIGURATION%"
   # Rename sh.exe as sh.exe in PATH interferes with MinGW
   - rename "C:\Program Files\Git\usr\bin\sh.exe" "sh2.exe"
+  - cmd: choco install OpenCV
+  - cmd: set OPENCV_DIR=C:\tools\opencv\build
 
 build_script:
 #  - dir "C:\Program Files (x86)\Microsoft Visual Studio\2017\Community\VC\Tools\MSVC\14.16.27023\include"

ci/install_travis.sh

@@ -23,7 +23,7 @@ conda config --add channels conda-forge --force
 # Useful for debugging any issues with conda
 conda info -a
 
-conda_pkgs="qt cmake"
+conda_pkgs="qt cmake opencv"
 
 conda create -q -p $our_install_dir ${conda_pkgs}