Appveyor: use VS 2019

appveyor.yml

@@ -1,10 +1,11 @@
 
 version: '{build}'
 
-image: Visual Studio 2017
+image: Visual Studio 2019
 
 environment:
   QTDIR: C:\Qt\5.13\msvc2017_64
+  QT_URL: https://cdn.discordapp.com/attachments/442667232489897997/614126952953020416/msvc2017_64.7z
   LLVMLIBS: https://github.com/RPCS3/llvm/releases/download/continuous-master/llvmlibs.7z
   GLSLANG: https://dl.dropboxusercontent.com/s/ku2qgwmtfptzbvx/glslang.7z
   COMPATDB: https://rpcs3.net/compatibility?api=v1&export
@@ -16,6 +17,7 @@ cache:
 - glslang.7z -> appveyor.yml
 - compat_database.dat
 - vulkan-sdk.exe -> appveyor.yml
+- msvc2017_64.7z -> appveyor.yml
 
 install:
 - ps: | # set env vars for versioning
@@ -73,8 +75,10 @@ before_build:
     )
     if (!(test-path llvmlibs.7z)) { irm $env:LLVMLIBS -outfile llvmlibs.7z }
     if (!(test-path glslang.7z)) { irm $env:GLSLANG -outfile glslang.7z }
+    if (!(test-path msvc2017_64.7z)) { irm $env:QT_URL -outfile msvc2017_64.7z }
     7z x llvmlibs.7z -aos -o"." | out-null
     7z x glslang.7z -aos -o".\lib\$env:CONFIGURATION-$env:PLATFORM" | out-null
+    7z x msvc2017_64.7z -aos -o"C:\Qt\5.13" | out-null
     if (!(test-path vulkan-sdk.exe))
     {
         foreach ($url in $VULKAN_SDK_URLS) {

common_default.props

@@ -1,10 +1,10 @@
-<?xml version="1.0" encoding="utf-8"?> 
+<?xml version="1.0" encoding="utf-8"?>
 <Project ToolsVersion="4.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
 <!-- Common default props for defining properties without macros. Import right before Microsoft.Cpp.Default.props -->
   <ImportGroup Label="PropertySheets" />
   <PropertyGroup Label="UserMacros" />
   <PropertyGroup Label="Globals">
-    <WindowsTargetPlatformVersion>8.1</WindowsTargetPlatformVersion>
+    <WindowsTargetPlatformVersion>10.0</WindowsTargetPlatformVersion>
   </PropertyGroup>
   <ItemDefinitionGroup>
     <ClCompile>