Preparing for the release

Author: alexeyzimarev

src/RestSharp/Extensions/ReflectionExtensions.cs

@@ -64,7 +64,7 @@ public static bool IsSubclassOfRawGeneric(this Type toCheck, Type generic)
 
         internal static object ChangeType(this object source, Type newType, IFormatProvider provider) => Convert.ChangeType(source, newType, provider);
 
-        internal static object ChangeType(this object source, Type newType) => Convert.ChangeType(source, newType);
+        internal static object? ChangeType(this object? source, Type newType) => Convert.ChangeType(source, newType);
 
         /// <summary>
         /// Find a value from a System.Enum by trying several possible variants

src/RestSharp/Serializers/IDeserializer.cs

@@ -12,10 +12,10 @@
 //   See the License for the specific language governing permissions and
 //   limitations under the License. 
 
-namespace RestSharp.Deserializers
-{
-    public interface IDeserializer
-    {
+// ReSharper disable once CheckNamespace
+
+namespace RestSharp.Deserializers {
+    public interface IDeserializer {
         T Deserialize<T>(IRestResponse response);
     }
 }

src/RestSharp/Serializers/IRestSerializer.cs

@@ -15,14 +15,14 @@
 using RestSharp.Deserializers;
 using RestSharp.Serializers;
 
-namespace RestSharp.Serialization
-{
-    public interface IRestSerializer : ISerializer, IDeserializer
-    {
+// ReSharper disable CheckNamespace
+
+namespace RestSharp.Serialization {
+    public interface IRestSerializer : ISerializer, IDeserializer {
         string[] SupportedContentTypes { get; }
 
         DataFormat DataFormat { get; }
 
-        string Serialize(Parameter parameter);
+        string? Serialize(Parameter parameter);
     }
 }

src/RestSharp/Serializers/ISerializer.cs

@@ -17,6 +17,6 @@ namespace RestSharp.Serializers
     public interface ISerializer
     {
         string ContentType { get; set; }
-        string Serialize(object obj);
+        string? Serialize(object obj);
     }
 }

src/RestSharp/Serializers/IWithRootElement.cs

@@ -16,6 +16,6 @@ namespace RestSharp.Serialization
 {
     public interface IWithRootElement
     {
-        string RootElement { get; set; }
+        string? RootElement { get; set; }
     }
 }