add VS 2022 generators (#2055)

src/kit.ts

@@ -851,7 +851,8 @@ const VsGenerators: {[key: string]: string} = {
   VS140COMNTOOLS: 'Visual Studio 14 2015',
   14: 'Visual Studio 14 2015',
   15: 'Visual Studio 15 2017',
-  16: 'Visual Studio 16 2019'
+  16: 'Visual Studio 16 2019',
+  17: 'Visual Studio 17 2022'
 };
 
 async function varsForVSInstallation(inst: VSInstallation, hostArch: string, targetArch?: string): Promise<Map<string, string>|null> {