Changing version from 1.9.0 to 2.0.0

Author: bganapa

src/AzureStack/AzureStack.nuspec

@@ -2,7 +2,7 @@
 <package xmlns="http://schemas.microsoft.com/packaging/2013/05/nuspec.xsd">
   <metadata>
     <id>AzureStack</id>
-    <version>1.9.0</version>
+    <version>2.0.0</version>
     <authors>Microsoft Corporation</authors>
     <owners>Microsoft Corporation</owners>
     <requireLicenseAcceptance>true</requireLicenseAcceptance>