Fix bad serials (#304)

- [X] Fixes bad serial calculations
- [X] Tightens HexStrings

Bumps release version
Updates documentation

Projects/Server.Tests/Helpers/AssertExtensions.cs

@@ -0,0 +1,15 @@
+using System;
+using System.Text;
+
+namespace Server.Tests
+{
+    public static class AssertThat
+    {
+        // TODO: Swap actual and expected to match Assert
+        public static void Equal(ReadOnlySpan<byte> actual, ReadOnlySpan<byte> expected) =>
+            Xunit.Assert.True(
+                expected.SequenceEqual(actual),
+                $"Expected does not match actual.\nExpected:\t{expected.ToDelimitedHexString()}\nActual:\t\t{actual.ToDelimitedHexString()}"
+            );
+    }
+}

Projects/Server.Tests/Helpers/EncodingHelpers.cs

@@ -0,0 +1,16 @@
+using System.Text;
+
+namespace Server.Tests
+{
+    public static class EncodingHelpers
+    {
+        public static Encoding GetEncoding(string bodyname) =>
+            bodyname switch
+            {
+                "utf-8"    => Utility.UTF8,
+                "utf-16"   => Utility.UnicodeLE,
+                "utf-16BE" => Utility.Unicode,
+                _          => Encoding.ASCII
+            };
+    }
+}