Update Versions.props (#1497)

Author: Johnny Pham

tools/props/Versions.props

@@ -6,7 +6,7 @@
     <!-- Should only be changed in future when a non-backwards compatible driver is released. -->
     <!-- Future Assembly Version values shall be Major.Minor.0.0; e.g. 4.0.0.0 -->
     <AssemblyVersion>4.0.0.0</AssemblyVersion>
-    <NugetPackageVersion Condition="'$(NugetPackageVersion)' == ''">5.0.0-dev</NugetPackageVersion>
+    <NugetPackageVersion Condition="'$(NugetPackageVersion)' == ''">4.0.0-dev</NugetPackageVersion>
     <Version>$(NugetPackageVersion)</Version>
   </PropertyGroup>
   <!-- NetFx project dependencies -->