update microsoft identity web to msal 3.0.8 (#97)

Author: MarkZuber

Microsoft.Identity.Web/Microsoft.Identity.Web.csproj

@@ -3,10 +3,10 @@
   <PropertyGroup>
     <TargetFramework>netcoreapp2.2</TargetFramework>
   </PropertyGroup>
-  
+
   <ItemGroup>
     <PackageReference Include="Microsoft.AspNetCore.App" />
     <PackageReference Include="Microsoft.AspNetCore.Authentication.AzureAD.UI" Version="2.2.0" />
-    <PackageReference Include="Microsoft.Identity.Client" Version="3.0.3-preview" />
+    <PackageReference Include="Microsoft.Identity.Client" Version="3.0.8" />
   </ItemGroup>
 </Project>