IRCv3 compliance

# IRCv3 Specifications
## IRCv3.1
### Base Extensions
- [x] [Capability Negotiation](http://ircv3.net/specs/core/capability-negotiation-3.1.html)
- [x] [`multi-prefix` Extension](http://ircv3.net/specs/extensions/multi-prefix-3.1.html)
- [x] [`sasl` Extension](http://ircv3.net/specs/extensions/sasl-3.1.html)

### Optional Extensions
- [x] [`account-notify` Extension](http://ircv3.net/specs/extensions/account-notify-3.1.html)
- [ ] [`away-notify` Extension](http://ircv3.net/specs/extensions/away-notify-3.1.html)
- [x] [`extended-join` Extension](http://ircv3.net/specs/extensions/extended-join-3.1.html)
- [ ] [`tls` Extension](http://ircv3.net/specs/extensions/tls-3.1.html)

## IRCv3.2
### Base Extensions
- [x] [Capability Negotiation](http://ircv3.net/specs/core/capability-negotiation-3.2.html)
- [x] [Message Tags](http://ircv3.net/specs/core/message-tags-3.2.html)
- [x] [`metadata` Extension](http://ircv3.net/specs/core/metadata-3.2.html) Deprecated
- [ ] [`monitor` Extension](http://ircv3.net/specs/core/monitor-3.2.html)

### Optional Extensions
- [ ] [`account-tag` Extension](http://ircv3.net/specs/extensions/account-tag-3.2.html) - **Suported with message tags, needs implementation**
- [ ] [`batch` Extension](http://ircv3.net/specs/extensions/batch-3.2.html)
- [x] [`cap-notify` Extension](http://ircv3.net/specs/extensions/cap-notify-3.2.html)
- [x] [`chghost` Extension](http://ircv3.net/specs/extensions/chghost-3.2.html)
- [ ] [`echo-message` Extension](http://ircv3.net/specs/extensions/echo-message-3.2.html)
- [ ] [`invite-notify` Extension](http://ircv3.net/specs/extensions/invite-notify-3.2.html)
- [x] [`sasl` Extension](http://ircv3.net/specs/extensions/sasl-3.2.html)
- [ ] [`server-time` Extension](http://ircv3.net/specs/extensions/server-time-3.2.html) - **Supported with message tags, implementation needed to use in logging**
- [ ] [`userhost-in-names` Extension](http://ircv3.net/specs/extensions/userhost-in-names-3.2.html)