vault-helm 0.15.0 release (hashicorp#598)

vault-helm 0.14.0 release (hashicorp#578)

Update to v0.13.0 (hashicorp#554)

Update to v0.12.0 (hashicorp#532)

* Update to v0.12.0

* Update values.schema.json

* Fix schema types

* revert image repo

Update to v0.11.0 (hashicorp#497)

changelog++

0.9.1 release updates (hashicorp#455)

Changelog, chart metadata, and image versions

0.9.0 release updates (hashicorp#439)

Changelog, chart metadata, and image versions

Update to 0.8.0 (hashicorp#405)

* Update to 0.8.0

* Fix changelog formatting

Update to 0.7.0 (hashicorp#374)

Update to 0.7.0