v0.12

Features:

• Support for multiple conditional forwarders per domain
• prefetching of often used queries

Misc

• Updated dependencies
• Updated Grafana dashboard
• Log output to stdout instead of stderr (#115) - thanks @kbadk
• optional bind address for DNS port (#116)
• Reduce memory usage of list caches (#120)
• replaced swagger-ui with static version to reduce memory footprint

Bugfixes

• Error for upstream ipv6 address (#119)