Automated SDK update

This updates the SDK from internal repo commit segmentio/public-api@64bdd4a0.

Author: APIs and Common Services team

Segment.PublicApi.sln

@@ -2,18 +2,18 @@
 # Visual Studio 2012
 VisualStudioVersion = 12.0.0.0
 MinimumVisualStudioVersion = 10.0.0.1
-Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Segment.PublicApi", "src\Segment.PublicApi\Segment.PublicApi.csproj", "{AC3E8964-E5B2-4736-A6B7-EFA952C70D99}"
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Segment.PublicApi", "src\Segment.PublicApi\Segment.PublicApi.csproj", "{73F0AD43-323C-463C-8250-6AF8E427C85E}"
 EndProject
 Global
 	GlobalSection(SolutionConfigurationPlatforms) = preSolution
 		Debug|Any CPU = Debug|Any CPU
 		Release|Any CPU = Release|Any CPU
 	EndGlobalSection
 	GlobalSection(ProjectConfigurationPlatforms) = postSolution
-		{AC3E8964-E5B2-4736-A6B7-EFA952C70D99}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
-		{AC3E8964-E5B2-4736-A6B7-EFA952C70D99}.Debug|Any CPU.Build.0 = Debug|Any CPU
-		{AC3E8964-E5B2-4736-A6B7-EFA952C70D99}.Release|Any CPU.ActiveCfg = Release|Any CPU
-		{AC3E8964-E5B2-4736-A6B7-EFA952C70D99}.Release|Any CPU.Build.0 = Release|Any CPU
+		{73F0AD43-323C-463C-8250-6AF8E427C85E}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{73F0AD43-323C-463C-8250-6AF8E427C85E}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{73F0AD43-323C-463C-8250-6AF8E427C85E}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{73F0AD43-323C-463C-8250-6AF8E427C85E}.Release|Any CPU.Build.0 = Release|Any CPU
 	EndGlobalSection
 	GlobalSection(SolutionProperties) = preSolution
 		HideSolutionNode = FALSE