Release v0.7.6

• Bump kustomize version to 0.7.5 (#1905) @Raffo

• Fix typos (#1892) @bl-ue

• fix doc: Correct document for aws.md about route53 health check association (#1898) @RaymondKYLiu

• digitalocean: Set a custom user-agent string. (#1893) @andrewsomething

• feat: use ClusterIP with internal-hostname annotation (#1425) @btoonk

• Fix typo in comment (#1909) @fenggw-fnst

• Update release script to include squashed commits (#1919) @Raffo

• Add flag to opt in for NS records management (#1915) (#1915) @Raffo