Increase Minimum Version of Visual Studio to 15.3.0

Routing.sln

@@ -1,7 +1,7 @@
 Microsoft Visual Studio Solution File, Format Version 12.00
 # Visual Studio 15
 VisualStudioVersion = 15.0.26824.3000
-MinimumVisualStudioVersion = 10.0.40219.1
+MinimumVisualStudioVersion = 15.0.26730.03
 Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "src", "src", "{0E966C37-7334-4D96-AAF6-9F49FBD166E3}"
 	ProjectSection(SolutionItems) = preProject
 		src\Directory.Build.props = src\Directory.Build.props