Increase Minimum Version of Visual Studio to 15.3.0

Session.sln

@@ -1,7 +1,7 @@
 Microsoft Visual Studio Solution File, Format Version 12.00
 # Visual Studio 15
 VisualStudioVersion = 15.0.26621.2
-MinimumVisualStudioVersion = 10.0.40219.1
+MinimumVisualStudioVersion = 15.0.26730.03
 Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "test", "test", "{E9D63F97-6078-42AD-BFD3-F956BF921BB5}"
 	ProjectSection(SolutionItems) = preProject
 		test\Directory.Build.props = test\Directory.Build.props