Branding changes for 9.0 (#5400)

Author: joperezr

eng/Versions.props

@@ -1,10 +1,10 @@
 <Project>
   <PropertyGroup>
     <!-- This repo version -->
-    <MajorVersion>8</MajorVersion>
-    <MinorVersion>2</MinorVersion>
+    <MajorVersion>9</MajorVersion>
+    <MinorVersion>0</MinorVersion>
     <PatchVersion>0</PatchVersion>
-    <VersionPrefix>8.2.0</VersionPrefix>
+    <VersionPrefix>9.0.0</VersionPrefix>
     <PreReleaseVersionLabel>preview.1</PreReleaseVersionLabel>
     <!--
       When running package validation as part of the build, we want to ensure we didn't break the API against the previous