updated to Confluent.Kafka v1.2.0 to fix strong-naming breaking change

Signed-off-by: Vasili Puchko <[email protected]>

Author: Vasili Puchko

src/CloudNative.CloudEvents.Kafka/CloudNative.CloudEvents.Kafka.csproj

@@ -10,7 +10,7 @@
   </PropertyGroup>
 
   <ItemGroup>
-    <PackageReference Include="Confluent.Kafka" Version="1.1.0" />
+    <PackageReference Include="Confluent.Kafka" Version="1.2.0" />
   </ItemGroup>
 
   <ItemGroup>