Bump version to 2.0.0-beta1

Author: Lamparter

eng/CurrentVersion.props

@@ -4,7 +4,7 @@
         <MajorVersion>2</MajorVersion>
         <MinorVersion>0</MinorVersion>
         <MicroVersion>0</MicroVersion>
-        <ReleaseLevel>alpha</ReleaseLevel>
+        <ReleaseLevel>beta</ReleaseLevel>
 
         <BetaVersion Condition="'$(ReleaseLevel)' !='final'">1</BetaVersion>
     </PropertyGroup>