Added CollectPackageReferences beforetarget

This should avoid issues where references are bundled with the incorrect version.

See TurnerSoftware/CacheTower#176 for example

Author: Turnerj

src/TurnerSoftware.BuildVersioning/build/TurnerSoftware.BuildVersioning.targets

@@ -22,7 +22,7 @@
           Condition="$(DesignTimeBuild) != 'true' AND $(SkipBuildVersioning) != 'true'" />
 
   <Target Name="BuildVersioning" 
-          BeforeTargets="BeforeCompile;GenerateNuspec" 
+          BeforeTargets="BeforeCompile;GenerateNuspec;CollectPackageReferences" 
           Condition="$(DesignTimeBuild) != 'true' AND $(SkipBuildVersioning) != 'true'">
     <Error Condition="'$(UsingMicrosoftNETSdk)' != 'true'" Code="BLDVER0001" Text="Build Versioning only works in SDK-style projects." />
     <Message Importance="$(BuildVersioningLogLevel)" Text="BuildVersioning: Project=$(MSBuildProjectFile)" />