Add new collation from MySQL 8.0.16.

https://dev.mysql.com/doc/relnotes/mysql/8.0/en/news-8-0-16.html#mysqld-8-0-16-charset

Author: bgrainger

src/MySqlConnector/Protocol/CharacterSet.cs

@@ -3,7 +3,7 @@ namespace MySqlConnector.Protocol
 	/// <summary>
 	/// MySQL character set codes.
 	/// </summary>
-	/// <remarks>Obtained from <c>SELECT id, collation_name FROM information_schema.collations ORDER BY id;</c> on MySQL 8.0.3.</remarks>
+	/// <remarks>Obtained from <c>SELECT id, collation_name FROM information_schema.collations ORDER BY id;</c> on MySQL 8.0.16.</remarks>
 	internal enum CharacterSet : ushort
 	{
 		None = 0,
@@ -277,6 +277,7 @@ internal enum CharacterSet : ushort
 		Utf8Mb4Uca900AccentSensitiveCaseInsensitive = 305,
 		Utf8Mb4RussianUca900AccentInsensitiveCaseInsensitive = 306,
 		Utf8Mb4RussianUca900AccentSensitiveCaseSensitive = 307,
+		Utf8Mb4ChineseUca900AccentSensitiveCaseSensitive = 308,
 		Utf8CroatianCaseInsensitiveMariaDb = 576,
 		Utf8MyanmarCaseInsensitive = 577,
 		Utf8ThaiUnicode520Weight2 = 578,

src/MySqlConnector/Protocol/Serialization/ProtocolUtility.cs

@@ -369,6 +369,7 @@ public static int GetBytesPerCharacter(CharacterSet characterSet)
 			case CharacterSet.Utf8Mb4Uca900AccentSensitiveCaseInsensitive:
 			case CharacterSet.Utf8Mb4RussianUca900AccentInsensitiveCaseInsensitive:
 			case CharacterSet.Utf8Mb4RussianUca900AccentSensitiveCaseSensitive:
+			case CharacterSet.Utf8Mb4ChineseUca900AccentSensitiveCaseSensitive:
 			case CharacterSet.Utf8Mb4CroatianCaseInsensitiveMariaDb:
 			case CharacterSet.Utf8Mb4MyanmarCaseInsensitive:
 			case CharacterSet.Utf8Mb4ThaiUnicode520Weight2: