v1.7.0

• Fix: nil pointer dereference when Network was not found
• Update hcloud-go to 1.20.0
• Add HCLOUD_LOAD_BALANCERS_ENABLED env variable to disable the Load
  Balancer feature, per default the Load Balancers are enabled.
• Use defaults if health check annotations are not set.
• Add support for changing the Load Balancer type