package/ci: build for MSVC 2019 on AppVeyor.

Three new builds (GL, GLES2, GLES3), Vulkan is now built with just MSVC
2019; removed 2015 RT builds because nobody cares and axed also GLES
2015 builds. In total it's one build less (well, the RT ones are
really slow, so way more than that in fact). Yay!

package/ci/appveyor-desktop-gles.bat

@@ -1,5 +1,5 @@
+if "%APPVEYOR_BUILD_WORKER_IMAGE%" == "Visual Studio 2019" call "C:/Program Files (x86)/Microsoft Visual Studio/2019/Community/VC/Auxiliary/Build/vcvarsall.bat" x64 || exit /b
 if "%APPVEYOR_BUILD_WORKER_IMAGE%" == "Visual Studio 2017" call "C:/Program Files (x86)/Microsoft Visual Studio/2017/Community/VC/Auxiliary/Build/vcvarsall.bat" x64 || exit /b
-if "%APPVEYOR_BUILD_WORKER_IMAGE%" == "Visual Studio 2015" call "C:/Program Files (x86)/Microsoft Visual Studio 14.0/VC/vcvarsall.bat" x64 || exit /b
 set PATH=%APPVEYOR_BUILD_FOLDER%/openal/bin/Win64;%APPVEYOR_BUILD_FOLDER%\deps\bin;%PATH%
 
 rem Build Corrade

package/ci/appveyor-desktop-vulkan.bat

@@ -1,5 +1,4 @@
-if "%APPVEYOR_BUILD_WORKER_IMAGE%" == "Visual Studio 2017" call "C:/Program Files (x86)/Microsoft Visual Studio/2017/Community/VC/Auxiliary/Build/vcvarsall.bat" x64 || exit /b
-if "%APPVEYOR_BUILD_WORKER_IMAGE%" == "Visual Studio 2015" call "C:/Program Files (x86)/Microsoft Visual Studio 14.0/VC/vcvarsall.bat" x64 || exit /b
+if "%APPVEYOR_BUILD_WORKER_IMAGE%" == "Visual Studio 2019" call "C:/Program Files (x86)/Microsoft Visual Studio/2019/Community/VC/Auxiliary/Build/vcvarsall.bat" x64 || exit /b
 set PATH=%APPVEYOR_BUILD_FOLDER%/openal/bin/Win64;%APPVEYOR_BUILD_FOLDER%\deps\bin;%PATH%
 
 rem Build Corrade

package/ci/appveyor-desktop.bat

@@ -1,3 +1,4 @@
+if "%APPVEYOR_BUILD_WORKER_IMAGE%" == "Visual Studio 2019" call "C:/Program Files (x86)/Microsoft Visual Studio/2019/Community/VC/Auxiliary/Build/vcvarsall.bat" x64 || exit /b
 if "%APPVEYOR_BUILD_WORKER_IMAGE%" == "Visual Studio 2017" call "C:/Program Files (x86)/Microsoft Visual Studio/2017/Community/VC/Auxiliary/Build/vcvarsall.bat" x64 || exit /b
 if "%APPVEYOR_BUILD_WORKER_IMAGE%" == "Visual Studio 2015" call "C:/Program Files (x86)/Microsoft Visual Studio 14.0/VC/vcvarsall.bat" x64 || exit /b
 set PATH=%APPVEYOR_BUILD_FOLDER%/openal/bin/Win64;%APPVEYOR_BUILD_FOLDER%\deps\bin;%PATH%

package/ci/appveyor-rt.bat

@@ -1,6 +1,4 @@
 if "%APPVEYOR_BUILD_WORKER_IMAGE%" == "Visual Studio 2017" call "C:/Program Files (x86)/Microsoft Visual Studio/2017/Community/VC/Auxiliary/Build/vcvarsall.bat" x64 || exit /b
-if "%APPVEYOR_BUILD_WORKER_IMAGE%" == "Visual Studio 2015" call "C:/Program Files (x86)/Microsoft Visual Studio 14.0/VC/vcvarsall.bat" x64 || exit /b
-if "%APPVEYOR_BUILD_WORKER_IMAGE%" == "Visual Studio 2015" set GENERATOR=Visual Studio 14 2015
 if "%APPVEYOR_BUILD_WORKER_IMAGE%" == "Visual Studio 2017" set GENERATOR=Visual Studio 15 2017
 set PATH=%APPVEYOR_BUILD_FOLDER%\deps-native\bin;%PATH%
 

package/ci/appveyor.yml

@@ -10,42 +10,38 @@ environment:
     COMPILER: msvc
     APPVEYOR_BUILD_WORKER_IMAGE: Visual Studio 2017
     APPVEYOR_JOB_NAME: windows-gl-msvc2017
+  - TARGET: desktop
+    COMPILER: msvc
+    APPVEYOR_BUILD_WORKER_IMAGE: Visual Studio 2019
+    APPVEYOR_JOB_NAME: windows-gl-msvc2019
   - TARGET: desktop-vulkan
     COMPILER: msvc
-    APPVEYOR_BUILD_WORKER_IMAGE: Visual Studio 2017
-    APPVEYOR_JOB_NAME: windows-vulkan-msvc2017
+    APPVEYOR_BUILD_WORKER_IMAGE: Visual Studio 2019
+    APPVEYOR_JOB_NAME: windows-vulkan-msvc2019
   - TARGET: desktop
     COMPILER: mingw
     APPVEYOR_BUILD_WORKER_IMAGE: Visual Studio 2017
     APPVEYOR_JOB_NAME: windows-gl-mingw
-  - TARGET: desktop-gles
-    TARGET_GLES2: ON
-    APPVEYOR_BUILD_WORKER_IMAGE: Visual Studio 2015
-    APPVEYOR_JOB_NAME: windows-gles2-msvc2015
   - TARGET: desktop-gles
     TARGET_GLES2: ON
     APPVEYOR_BUILD_WORKER_IMAGE: Visual Studio 2017
     APPVEYOR_JOB_NAME: windows-gles2-msvc2017
   - TARGET: desktop-gles
-    TARGET_GLES2: OFF
-    APPVEYOR_BUILD_WORKER_IMAGE: Visual Studio 2015
-    APPVEYOR_JOB_NAME: windows-gles3-msvc2015
+    TARGET_GLES2: ON
+    APPVEYOR_BUILD_WORKER_IMAGE: Visual Studio 2019
+    APPVEYOR_JOB_NAME: windows-gles2-msvc2019
   - TARGET: desktop-gles
     TARGET_GLES2: OFF
     APPVEYOR_BUILD_WORKER_IMAGE: Visual Studio 2017
     APPVEYOR_JOB_NAME: windows-gles3-msvc2017
-  - TARGET: rt
-    TARGET_GLES2: ON
-    APPVEYOR_BUILD_WORKER_IMAGE: Visual Studio 2015
-    APPVEYOR_JOB_NAME: windows-rt-gles2-msvc2015
+  - TARGET: desktop-gles
+    TARGET_GLES2: OFF
+    APPVEYOR_BUILD_WORKER_IMAGE: Visual Studio 2019
+    APPVEYOR_JOB_NAME: windows-gles3-msvc2019
   - TARGET: rt
     TARGET_GLES2: ON
     APPVEYOR_BUILD_WORKER_IMAGE: Visual Studio 2017
     APPVEYOR_JOB_NAME: windows-rt-gles2-msvc2017
-  - TARGET: rt
-    TARGET_GLES2: OFF
-    APPVEYOR_BUILD_WORKER_IMAGE: Visual Studio 2015
-    APPVEYOR_JOB_NAME: windows-rt-gles3-msvc2015
   - TARGET: rt
     TARGET_GLES2: OFF
     APPVEYOR_BUILD_WORKER_IMAGE: Visual Studio 2017