Update emoji parser to account for miscellaneous characters that are not emojis (#993)

Closes #923

DiscordChatExporter.Core/Markdown/Parsing/MarkdownParser.cs

@@ -160,7 +160,7 @@ internal static partial class MarkdownParser
     // ... or digit followed by enclosing mark
     // (this does not match all emoji in Discord but it's reasonably accurate enough)
     private static readonly IMatcher<MarkdownNode> StandardEmojiNodeMatcher = new RegexMatcher<MarkdownNode>(
-        new Regex("((?:[\\uD83C][\\uDDE6-\\uDDFF]){2}|[\\u2600-\\u26FF]|\\p{Cs}{2}|\\d\\p{Me})", DefaultRegexOptions),
+        new Regex("((?:[\\uD83C][\\uDDE6-\\uDDFF]){2}|[\\u2600-\\u2604\\u260E\\u2611\\u2614-\\u2615\\u2618\\u261D\\u2620\\u2622-\\u2623\\u2626\\u262A\\u262E-\\u262F\\u2638-\\u263A\\u2640\\u2642\\u2648-\\u2653\\u265F-\\u2660\\u2663\\u2665-\\u2666\\u2668\\u267B\\u267E-\\u267F\\u2692-\\u2697\\u2699\\u269B-\\u269C\\u26A0-\\u26A1\\u26A7\\u26AA-\\u26AB\\u26B0-\\u26B1\\u26BD-\\u26BE\\u26C4-\\u26C5\\u26C8\\u26CE-\\u26CF\\u26D1\\u26D3-\\u26D4\\u26E9-\\u26EA\\u26F0-\\u26F5\\u26F7-\\u26FA\\u26FD]|\\p{Cs}{2}|\\d\\p{Me})", DefaultRegexOptions),
         (_, m) => new EmojiNode(m.Groups[1].Value)
     );