Fixes for SerialRtuProxy

- Adding UnitTests
- Fixing some bugs
- Updating UnitTest dependencies

AMWD.Protocols.Modbus.Tests/Helper.cs

@@ -0,0 +1,23 @@
+using System.Reflection;
+
+namespace AMWD.Protocols.Modbus.Tests
+{
+	internal static class Helper
+	{
+		public static T CreateInstance<T>(params object[] args)
+		{
+			var type = typeof(T);
+
+			object instance = type.Assembly.CreateInstance(
+				typeName: type.FullName,
+				ignoreCase: false,
+				bindingAttr: BindingFlags.Instance | BindingFlags.NonPublic,
+				binder: null,
+				args: args,
+				culture: null,
+				activationAttributes: null);
+
+			return (T)instance;
+		}
+	}
+}