Bump Microsoft.Extensions.Configuration.Abstractions from 2.1.1… (#321)

Bumps [Microsoft.Extensions.Configuration.Abstractions](https://github.com/aspnet/Extensions) from 2.1.1 to 2.2.0.
- [Release notes](https://github.com/aspnet/Extensions/releases)
- [Commits](dotnet/extensions@2.1.1...2.2.0)

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Author: dependabot-preview[bot]

Fritz.Chatbot/Fritz.Chatbot.csproj

@@ -11,7 +11,7 @@
   <ItemGroup>
     <PackageReference Include="Microsoft.AspNetCore.SignalR" Version="1.0.4" />
     <PackageReference Include="Microsoft.AspNetCore.SignalR.Client" Version="1.0.4" />
-    <PackageReference Include="Microsoft.Extensions.Configuration.Abstractions" Version="2.1.1" />
+    <PackageReference Include="Microsoft.Extensions.Configuration.Abstractions" Version="2.2.0" />
     <PackageReference Include="Microsoft.Extensions.Hosting.Abstractions" Version="2.1.1" />
     <PackageReference Include="Microsoft.Extensions.Http" Version="2.1.1" />
 		<PackageReference Include="Microsoft.Extensions.Logging.Abstractions" Version="2.2.0" />