fix: Position field now emits also 0 values in JSON (#23)

### Problem
Open API Generator sets `DataMember` attribute's `EmitDefaultValue` per default to `false`.

Unfortunately for some of our data models, it means that the emitted JSON for decimal values of `0` are ignored.

### Solution

Manually override the setting for those fields in these models.

Currently supported:
 - `src/TalonOne/Model/CartItem.cs`'s `Position` property
 - `src/TalonOne/Model/ReturnedCartItem.cs`'s `Position` property
 - `src/TalonOne/Model/SetDiscountPerItemEffectProps.cs`'s `Position` property
 
### Notes
 - This is a similar problem to the one fixed in #19 , with a couple of new Models

Makefile

@@ -14,7 +14,7 @@ endif
 		--rm \
 		-v $(PWD):/tmp/talon-client \
 		-w "/tmp/talon-client/$(BUILD_DIR)" \
-		mcr.microsoft.com/dotnet/sdk:3.1-focal-arm64v8 \
+		mcr.microsoft.com/dotnet/sdk:3.1-focal \
 			dotnet pack TalonOne.csproj \
 				-p:PackageVersion=$(VERSION) \
 				--output . \
@@ -34,7 +34,7 @@ endif
 		--rm \
 		-v $(PWD):/tmp/talon-client \
 		-w "/tmp/talon-client/$(BUILD_DIR)" \
-		mcr.microsoft.com/dotnet/sdk:3.1-focal-arm64v8 \
+		mcr.microsoft.com/dotnet/sdk:3.1-focal \
 			dotnet nuget push TalonOne.$(VERSION).nupkg \
 				--api-key $(apiKey) \
 				--source https://api.nuget.org/v3/index.json
@@ -44,5 +44,5 @@ testenv:
 		--rm -it \
 		-v $(PWD):/tmp/talon-client \
 		-w /tmp/talon-client \
-		mcr.microsoft.com/dotnet/sdk:3.1-focal-arm64v8 \
+		mcr.microsoft.com/dotnet/sdk:3.1-focal \
 		/bin/bash

README.md

@@ -19,7 +19,7 @@ is `https://mycompany.talon.one/v2/customer_sessions/{Id}`
 This C# SDK is automatically generated by the [OpenAPI Generator](https://openapi-generator.tech) project:
 
 - API version: 1.0.0
-- SDK version: 4.0.3
+- SDK version: 4.0.4
 - Build package: org.openapitools.codegen.languages.CSharpNetCoreClientCodegen
 
 <a name="frameworks-supported"></a>

src/TalonOne/Client/Configuration.cs

@@ -31,7 +31,7 @@ public class Configuration : IReadableConfiguration
         /// Version of the package.
         /// </summary>
         /// <value>Version of the package.</value>
-        public const string Version = "4.0.3";
+        public const string Version = "4.0.4";
 
         /// <summary>
         /// Identifier for ISO 8601 DateTime Format
@@ -96,7 +96,7 @@ public class Configuration : IReadableConfiguration
         [System.Diagnostics.CodeAnalysis.SuppressMessage("ReSharper", "VirtualMemberCallInConstructor")]
         public Configuration()
         {
-            UserAgent = "OpenAPI-Generator/4.0.3/csharp";
+            UserAgent = "OpenAPI-Generator/4.0.4/csharp";
             BasePath = "http://localhost";
             DefaultHeaders = new ConcurrentDictionary<string, string>();
             ApiKey = new ConcurrentDictionary<string, string>();
@@ -351,7 +351,7 @@ public static String ToDebugReport()
             String report = "C# SDK (TalonOne) Debug Report:\n";
             report += "    OS: " + System.Runtime.InteropServices.RuntimeInformation.OSDescription + "\n";
             report += "    Version of the API: 1.0.0\n";
-            report += "    SDK Package Version: 4.0.3\n";
+            report += "    SDK Package Version: 4.0.4\n";
 
             return report;
         }

src/TalonOne/Model/CartItem.cs

@@ -152,7 +152,7 @@ protected CartItem() { }
         /// Position of the Cart Item in the Cart (calculated internally)
         /// </summary>
         /// <value>Position of the Cart Item in the Cart (calculated internally)</value>
-        [DataMember(Name="position", EmitDefaultValue=false)]
+        [DataMember(Name="position", EmitDefaultValue=true)]
         public decimal Position { get; set; }
 
         /// <summary>

src/TalonOne/Model/ReturnedCartItem.cs

@@ -51,7 +51,7 @@ protected ReturnedCartItem() { }
         /// The index of the cart item in the provided customer session's `cartItems` property.
         /// </summary>
         /// <value>The index of the cart item in the provided customer session&#39;s &#x60;cartItems&#x60; property.</value>
-        [DataMember(Name="position", EmitDefaultValue=false)]
+        [DataMember(Name="position", EmitDefaultValue=true)]
         public int Position { get; set; }
 
         /// <summary>

src/TalonOne/Model/SetDiscountPerItemEffectProps.cs

@@ -76,7 +76,7 @@ protected SetDiscountPerItemEffectProps() { }
         /// The index of the item in the cart items list on which this discount should be applied.
         /// </summary>
         /// <value>The index of the item in the cart items list on which this discount should be applied.</value>
-        [DataMember(Name="position", EmitDefaultValue=false)]
+        [DataMember(Name="position", EmitDefaultValue=true)]
         public decimal Position { get; set; }
 
         /// <summary>

src/TalonOne/Properties/AssemblyInfo.cs

@@ -29,5 +29,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("4.0.3")]
-[assembly: AssemblyFileVersion("4.0.3")]
+[assembly: AssemblyVersion("4.0.4")]
+[assembly: AssemblyFileVersion("4.0.4")]