Add version.json as solution item

GitHubVS.sln

@@ -14,6 +14,7 @@ Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "Meta", "Meta", "{72036B62-2
 	ProjectSection(SolutionItems) = preProject
 		.editorconfig = .editorconfig
 		README.md = README.md
+		version.json = version.json
 	EndProjectSection
 EndProject
 Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "GitHub.UI", "src\GitHub.UI\GitHub.UI.csproj", "{346384DD-2445-4A28-AF22-B45F3957BD89}"