appveyor: use ninja + give priority to more recent compilers

appveyor.yml

@@ -2,6 +2,22 @@ environment:
   PYTHON: "C:\\Python37"
     
   matrix:
+    - APPVEYOR_BUILD_WORKER_IMAGE: Visual Studio 2015
+      CMAKE_GENERATOR: Ninja
+      INTEGRATION_TESTS: 1
+      VS_COMPILER_VERSION: 14
+      VCVARS: C:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\vcvarsall.bat
+      ARCHITECTURE: x86_64
+      UNIT_TESTS: 1
+      WARNINGS_AS_ERRORS: ON
+    - APPVEYOR_BUILD_WORKER_IMAGE: Visual Studio 2017
+      CMAKE_GENERATOR: Ninja
+      INTEGRATION_TESTS: 1
+      VS_COMPILER_VERSION: 15
+      VCVARS: C:\Program Files (x86)\Microsoft Visual Studio\2017\Community\VC\Auxiliary\Build\vcvarsall.bat
+      ARCHITECTURE: x86_64
+      UNIT_TESTS: 1
+      WARNINGS_AS_ERRORS: ON
     - APPVEYOR_BUILD_WORKER_IMAGE: Visual Studio 2013
       CMAKE_GENERATOR: Visual Studio 10 2010
       INTEGRATION_TESTS: 0
@@ -11,7 +27,7 @@ environment:
       UNIT_TESTS: 0
       WARNINGS_AS_ERRORS: OFF
     - APPVEYOR_BUILD_WORKER_IMAGE: Visual Studio 2013
-      CMAKE_GENERATOR: Visual Studio 11 2012 Win64
+      CMAKE_GENERATOR: Ninja
       INTEGRATION_TESTS: 0
       VS_COMPILER_VERSION: 11
       VCVARS: C:\Program Files (x86)\Microsoft Visual Studio 11.0\VC\vcvarsall.bat
@@ -19,29 +35,13 @@ environment:
       UNIT_TESTS: 1
       WARNINGS_AS_ERRORS: ON
     - APPVEYOR_BUILD_WORKER_IMAGE: Visual Studio 2013
-      CMAKE_GENERATOR: Visual Studio 12 2013 Win64
+      CMAKE_GENERATOR: Ninja
       INTEGRATION_TESTS: 0
       VS_COMPILER_VERSION: 12
       VCVARS: C:\Program Files (x86)\Microsoft Visual Studio 12.0\VC\vcvarsall.bat
       ARCHITECTURE: x86_64
       UNIT_TESTS: 1
       WARNINGS_AS_ERRORS: ON
-    - APPVEYOR_BUILD_WORKER_IMAGE: Visual Studio 2015
-      CMAKE_GENERATOR: Visual Studio 14 2015 Win64
-      INTEGRATION_TESTS: 1
-      VS_COMPILER_VERSION: 14
-      VCVARS: C:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\vcvarsall.bat
-      ARCHITECTURE: x86_64
-      UNIT_TESTS: 1
-      WARNINGS_AS_ERRORS: ON
-    - APPVEYOR_BUILD_WORKER_IMAGE: Visual Studio 2017
-      CMAKE_GENERATOR: Visual Studio 15 2017 Win64
-      INTEGRATION_TESTS: 1
-      VS_COMPILER_VERSION: 15
-      VCVARS: C:\Program Files (x86)\Microsoft Visual Studio\2017\Community\VC\Auxiliary\Build\vcvarsall.bat
-      ARCHITECTURE: x86_64
-      UNIT_TESTS: 1
-      WARNINGS_AS_ERRORS: ON
 
 shallow_clone: true
 
@@ -71,7 +71,6 @@ build_script:
     - cmd: cd build
     - cmd: call "%VCVARS%" x86_amd64
     - cmd: conan --version
-    - cmd: conan remote list
     - cmd: conan install .. -o webready=True --build missing
     - cmd: echo %CMAKE_GENERATOR%
     - cmd: cmake -G "%CMAKE_GENERATOR%" -DEXIV2_TEAM_WARNINGS_AS_ERRORS=%WARNINGS_AS_ERRORS% -DCMAKE_BUILD_TYPE=Release -DEXIV2_ENABLE_NLS=OFF -DEXIV2_ENABLE_PNG=ON -DEXIV2_ENABLE_WEBREADY=ON -DEXIV2_BUILD_UNIT_TESTS=%UNIT_TESTS% -DCMAKE_INSTALL_PREFIX=install ..