v0.13

Features:

• List refresh via REST api and CLI
• CLI runs without configuration file (#147)
• Multiple IP addresses for Custom DNS (#139)
• reverse DNS lookup for custom DNS entries (#139)
• Domain rewrite in conditional resolver (#128)

Misc

• Added additional prometheus metrics
• Updated dependencies
• Updated Grafana dashboard
• New documentation page: https://0xERR0R.github.io/blocky/
• Switching to Go 1.16