v1.22.0

[features]

• Added support for API to check BGPalerter status (e.g. for Nagios or Uptime Robot integration)
• Introduced possibility to monitor whatever is announced by an AS (#68)

[fixes]

• Upgraded all dependencies to latest version
• Replaced -pf with -l to fix multichar attribute issue (#62)
• Added logs during prefix file generation
• Improved wording of some error messages
• Refactored source organization
• Improved documentation