Bump version, use sonarcloud coverage badge

README.md

@@ -15,7 +15,7 @@ ConfigCat is a feature flag and configuration management service that lets you s
 ConfigCat is a <a href="https://configcat.com" target="_blank">hosted feature flag service</a>. Manage feature toggles across frontend, backend, mobile, desktop apps. <a href="https://configcat.com" target="_blank">Alternative to LaunchDarkly</a>. Management app + feature flag SDKs.
 
 [![Build status](https://ci.appveyor.com/api/projects/status/3kygp783vc2uv9xr?svg=true)](https://ci.appveyor.com/project/ConfigCat/net-sdk) [![NuGet Version](https://buildstats.info/nuget/ConfigCat.Client)](https://www.nuget.org/packages/ConfigCat.Client/)
-[![codecov](https://codecov.io/gh/configcat/.net-sdk/branch/master/graph/badge.svg)](https://codecov.io/gh/configcat/.net-sdk)
+[![Sonar Coverage](https://img.shields.io/sonar/coverage/net-sdk?logo=SonarCloud&server=https%3A%2F%2Fsonarcloud.io)](https://sonarcloud.io/project/overview?id=net-sdk) 
 [![Quality Gate Status](https://sonarcloud.io/api/project_badges/measure?project=net-sdk&metric=alert_status)](https://sonarcloud.io/dashboard?id=net-sdk)
 [![License: MIT](https://img.shields.io/badge/License-MIT-yellow.svg)](https://github.com/configcat/.net-sdk/blob/master/LICENSE)
 

appveyor.yml

@@ -1,4 +1,4 @@
-version: 6.3.{build}
+version: 6.4.{build}
 image: Visual Studio 2022
 configuration: Release
 skip_commits: