update appveyor script

.appveyor.yml

@@ -1,48 +1,29 @@
-version: "{branch} #{build}"
-
-shallow_clone: true
-
-image:
-  - Visual Studio 2017
-
-platform:
-  - Win32
-  - x64
-
-configuration:
-  - Debug
-  - Release
-
-build:
-  parallel: true
+build: false
 
 environment:
-  matrix:
-    - GENERATOR: "Visual Studio 15 2017"
+    PYTHON: "C:\\Python37"
+
+    matrix:
+        - MINGW_CONFIGURATIONS: '4.9@x86_64@seh@posix, 5@x86_64@seh@posix, 6@x86_64@seh@posix, 7@x86_64@seh@posix'
+        - APPVEYOR_BUILD_WORKER_IMAGE: Visual Studio 2015
+          CONAN_VISUAL_VERSIONS: 14
+          CONAN_BUILD_TYPES: Release
+        - APPVEYOR_BUILD_WORKER_IMAGE: Visual Studio 2015
+          CONAN_VISUAL_VERSIONS: 14
+          CONAN_BUILD_TYPES: Debug
+        - APPVEYOR_BUILD_WORKER_IMAGE: Visual Studio 2017
+          CONAN_VISUAL_VERSIONS: 15
+          CONAN_BUILD_TYPES: Release
+        - APPVEYOR_BUILD_WORKER_IMAGE: Visual Studio 2017
+          CONAN_VISUAL_VERSIONS: 15
+          CONAN_BUILD_TYPES: Debug
+
 
 install:
-  # getting Catch2 library
-  # redirect stderr to fix appveyor handling stderr
-  - ps: $env:GIT_REDIRECT_STDERR = '2>&1'
-  - ps: git clone https://github.com/catchorg/Catch2.git
-  - ps: cd Catch2
-  - ps: git checkout v2.9.1
-  - ps: mkdir build
-  - ps: cd build
-  - ps: pwd
-  - ps: cmake -DCATCH_BUILD_TESTING=OFF -DCATCH_INSTALL_DOCS=OFF -DCATCH_INSTALL_HELPERS=OFF -DCMAKE_INSTALL_PREFIX="$PWD/../installed" ..
-  - ps: cmake --build . --target install --config Release
-  - ps: cd ../..
-
-before_build:
-  - if exist build RMDIR /S /Q build
-  - if not exist build mkdir build
-  - cd build
-  - pwd
-  - cmake -G "%GENERATOR%" -A %PLATFORM% -DCMAKE_INSTALL_PREFIX="C:/projects/nameof/Catch2/installed" ..
-
-build_script:
-  - cmake --build . --config %CONFIGURATION%
+  - set PATH=%PATH%;%PYTHON%/Scripts/
+  - pip.exe install conan --upgrade
+  - pip.exe install conan_package_tools
+  - conan user # It creates the conan data directory
 
 test_script:
-  - ctest --output-on-failure -C %CONFIGURATION%
+  - python build.py