Update version to 0.6.0

Signed-off-by: James Sturtevant <jsturtevant@gmail.com>

Author: jsturtevant

Directory.Build.props

@@ -1,6 +1,6 @@
 <Project>
     <PropertyGroup>
-        <VersionPrefix>0.5.0</VersionPrefix>
+        <VersionPrefix>0.6.0</VersionPrefix>
         <VersionSuffix Condition="'$(BuildNumber)' == ''">dev</VersionSuffix>
         <VersionSuffix Condition="'$(BuildNumber)' != ''">preview$([System.String]::Format('{0:00000}', $([MSBuild]::Add($(BuildNumber), 0))))</VersionSuffix>
         <PackageVersion>$(VersionPrefix)-$(VersionSuffix)</PackageVersion>