Add string converters for uint/sbyte/byte (#1661)

* 1. Add string converters for uint/sbyte/byte
2. Fix typo in ulong converter

* add unit test

* fix typo

Author: SamZhangQingChuan

src/System.CommandLine.Tests/Binding/TypeConversionTests.cs

@@ -758,6 +758,66 @@ public void Values_can_be_correctly_converted_to_nullable_ushort_without_the_par
 
             value.Should().Be(1234);
         }
+        
+        [Fact]
+        public void Values_can_be_correctly_converted_to_sbyte_without_the_parser_specifying_a_custom_converter()
+        {
+            var option = new Option<sbyte>("-us");
+
+            var value = option.Parse("-us 123").GetValueForOption(option);
+
+            value.Should().Be(123);
+        }
+        
+        [Fact]
+        public void Values_can_be_correctly_converted_to_nullable_sbyte_without_the_parser_specifying_a_custom_converter()
+        {
+            var option = new Option<sbyte?>("-x");
+
+            var value = option.Parse("-x 123").GetValueForOption(option);
+
+            value.Should().Be(123);
+        }
+        
+        [Fact]
+        public void Values_can_be_correctly_converted_to_byte_without_the_parser_specifying_a_custom_converter()
+        {
+            var option = new Option<byte>("-us");
+
+            var value = option.Parse("-us 123").GetValueForOption(option);
+
+            value.Should().Be(123);
+        }
+        
+        [Fact]
+        public void Values_can_be_correctly_converted_to_nullable_byte_without_the_parser_specifying_a_custom_converter()
+        {
+            var option = new Option<byte?>("-x");
+
+            var value = option.Parse("-x 123").GetValueForOption(option);
+
+            value.Should().Be(123);
+        }
+        
+        [Fact]
+        public void Values_can_be_correctly_converted_to_uint_without_the_parser_specifying_a_custom_converter()
+        {
+            var option = new Option<uint>("-us");
+
+            var value = option.Parse("-us 1234").GetValueForOption(option);
+
+            value.Should().Be(1234);
+        }
+        
+        [Fact]
+        public void Values_can_be_correctly_converted_to_nullable_uint_without_the_parser_specifying_a_custom_converter()
+        {
+            var option = new Option<uint?>("-x");
+
+            var value = option.Parse("-x 1234").GetValueForOption(option);
+
+            value.Should().Be(1234);
+        }
 
         [Fact]
         public void Values_can_be_correctly_converted_to_array_of_int_without_the_parser_specifying_a_custom_converter()

src/System.CommandLine/Binding/ArgumentConverter.StringConverters.cs

@@ -163,6 +163,42 @@ internal static partial class ArgumentConverter
             return false;
         },
 
+        [typeof(uint)] = (string token, out object? value) =>
+        {
+            if (uint.TryParse(token, out var uintValue))
+            {
+                value = uintValue;
+                return true;
+            }
+
+            value = default;
+            return false;
+        },
+
+        [typeof(sbyte)] = (string token, out object? value) =>
+        {
+            if (sbyte.TryParse(token, out var sbyteValue))
+            {
+                value = sbyteValue;
+                return true;
+            }
+
+            value = default;
+            return false;
+        },
+
+        [typeof(byte)] = (string token, out object? value) =>
+        {
+            if (byte.TryParse(token, out var byteValue))
+            {
+                value = byteValue;
+                return true;
+            }
+
+            value = default;
+            return false;
+        },
+
         [typeof(string)] = (string input, out object? value) =>
         {
             value = input;
@@ -171,9 +207,9 @@ internal static partial class ArgumentConverter
 
         [typeof(ulong)] = (string token, out object? value) =>
         {
-            if (ulong.TryParse(token, out var ushortValue))
+            if (ulong.TryParse(token, out var ulongValue))
             {
-                value = ushortValue;
+                value = ulongValue;
                 return true;
             }