Bump version to 3.1.0

Author: MIchaelMainer

src/Microsoft.Graph/Microsoft.Graph.csproj

@@ -19,7 +19,7 @@
     <DelaySign>false</DelaySign>
     <AssemblyOriginatorKeyFile>35MSSharedLib1024.snk</AssemblyOriginatorKeyFile>
     <AutoGenerateBindingRedirects>true</AutoGenerateBindingRedirects>
-    <VersionPrefix>3.0.1</VersionPrefix>
+    <VersionPrefix>3.1.0</VersionPrefix>
     <!-- VersionPrefix minor version should not be set when the change comes from the generator. It will be updated automatically. -->
     <!-- VersionPrefix minor version must be manually set when making manual changes to code. -->
     <!-- VersionPrefix major and patch versions must be manually set. -->