[FIX] Crash when parsing alternate link format in some cases

[CHORE] Bump version to 3.0.4

[FIX] Mistake in Alternate Link Parsing

[FIX] Crash at RCMarkdownParser.swift line 284

bump version 3.0.3

[FIX] Conflict between link and image link parsing

[NEW] Implement Rocket.Chat markdown

* Fixed link detection to not fail when there's a . or - in the URL

* Better fix for all links that have been escaped through markdown process
Brought over a couple of changes that have been done to TSMarkdown with (un)escaping
Added tests

Fix invalid name/value link attribute pair.