Updated submodules (improvements to UWP build)

Updated readme instructions to use VS2019

Author: TheMostDiligent

DiligentCore

@@ -147,17 +147,17 @@ Build prerequisites:
 * Visual C++ ATL Support
 
 Use either CMake GUI or command line tool to generate build files. For example, to generate 
-[Visual Studio 2017](https://www.visualstudio.com/vs/community) 64-bit solution and project files in *build/Win64* folder, 
+[Visual Studio 2019](https://www.visualstudio.com/vs/community) 64-bit solution and project files in *build/Win64* folder, 
 navigate to the engine's root folder and run the following command:
 
 ```
-cmake -S . -B ./build/Win64 -G "Visual Studio 15 2017" -A x64
+cmake -S . -B ./build/Win64 -G "Visual Studio 16 2019" -A x64
 ```
 
 You can generate Win32 solution that targets Win8.1 SDK using the following command:
 
 ```
-cmake -D CMAKE_SYSTEM_VERSION=8.1 -S . -B ./build/Win64_8.1 -G "Visual Studio 15 2017" -A x64
+cmake -D CMAKE_SYSTEM_VERSION=8.1 -S . -B ./build/Win64_8.1 -G "Visual Studio 16 2019" -A x64
 ```
 
 If you use MinGW, you can generate the make files using the command below (please be aware of some [known build issues](https://github.com/ocornut/imgui/issues/3183)):
@@ -188,17 +188,17 @@ To generate build files for Universal Windows platform, you need to define the f
 * `CMAKE_SYSTEM_NAME=WindowsStore`
 * `CMAKE_SYSTEM_VERSION=< Windows SDK Version >`
 
-For example, to generate Visual Studio 2017 64-bit solution and project files in *build/UWP64* folder, run the following command
+For example, to generate Visual Studio 2019 64-bit solution and project files in *build/UWP64* folder, run the following command
 from the engine's root folder:
 
 ```
-cmake -D CMAKE_SYSTEM_NAME=WindowsStore -D CMAKE_SYSTEM_VERSION=10.0 -S . -B ./build/UWP64 -G "Visual Studio 15 2017" -A x64
+cmake -D CMAKE_SYSTEM_NAME=WindowsStore -D CMAKE_SYSTEM_VERSION=10.0 -S . -B ./build/UWP64 -G "Visual Studio 16 2019" -A x64
 ```
 
 You can target specific SDK version by refining CMAKE_SYSTEM_VERSION, for instance:
 
 ```
-cmake -D CMAKE_SYSTEM_NAME=WindowsStore -D CMAKE_SYSTEM_VERSION=10.0.16299.0 -S . -B ./build/UWP64 -G "Visual Studio 15 2017" -A x64
+cmake -D CMAKE_SYSTEM_NAME=WindowsStore -D CMAKE_SYSTEM_VERSION=10.0.16299.0 -S . -B ./build/UWP64 -G "Visual Studio 16 2019" -A x64
 ```
 
 Set the desired project as startup project (by default, GLTF Viewer will be selected) and run it. 
@@ -444,7 +444,7 @@ Note that it defaults to `/usr/local` on UNIX and `c:/Program Files/${PROJECT_NA
 be what you want. Use `-D CMAKE_INSTALL_PREFIX=install` to use local `install` folder instead:
 
 ```
-cmake -S . -B ./build/Win64 -D CMAKE_INSTALL_PREFIX=install -G "Visual Studio 15 2017" -A x64
+cmake -S . -B ./build/Win64 -D CMAKE_INSTALL_PREFIX=install -G "Visual Studio 16 2019" -A x64
 ```
 
 To install libraries and header files, run the following CMake command from the build folder:
@@ -488,7 +488,7 @@ use the following options: `DILIGENT_NO_DIRECT3D11`, `DILIGENT_NO_DIRECT3D12`, `
 The options can be set through cmake UI or from the command line as in the example below:
 
 ```
-cmake -D DILIGENT_NO_DIRECT3D11=TRUE -S . -B ./build/Win64 -G "Visual Studio 15 2017" -A x64
+cmake -D DILIGENT_NO_DIRECT3D11=TRUE -S . -B ./build/Win64 -G "Visual Studio 16 2019" -A x64
 ```
 
 Additionally, individual engine components can be enabled or disabled using the following options:
@@ -522,7 +522,7 @@ The path to the configuration script should be provided through `BUILD_CONFIGURA
 cmake and must be relative to the cmake root folder, for example:
 
 ```
-cmake -D BUILD_CONFIGURATION_FILE=BuildConfig.cmake -S . -B ./build/Win64 -G "Visual Studio 15 2017" -A x64
+cmake -D BUILD_CONFIGURATION_FILE=BuildConfig.cmake -S . -B ./build/Win64 -G "Visual Studio 16 2019" -A x64
 ```
 
 ### Customizing global build settings with custom_configure_build() function