irc/epic5: Update to 3.0

Changelog:

From the UPDATES file:

• Random numbers source from BYTES_random() exclusively
• SOCKS4 and SOCKS5 support retired
• Flood control support retired
• RGB 24-bit color support!
• Status sub-expandos now protect from expansion
• New $hex(<digits> <number>) hex-to-decimal converter function
• Improvements to the reconnect script
• /WINDOW LISTER can now work on a list of window refnums
• Configurable blank line indicator
• Can now output the value of a builtin variable when it was initialized
• New /on PING, triggered by server pings
• Basic CAP support
• New server SSL client certificate description field
• Window clear point tracking
• CTCP cloaking
• Control active/inactive CTCPs
• EPIC5-2.6 (2137 - Sedulous) released here

PR: 281169