[Full Changelog](https://github.com/habitat-sh/habitat/compare/1.6.39..1.6.56)

### Bug Fixes
- CtlGateway handshake fix [#7755](https://github.com/habitat-sh/habitat/pull/7755) ([davidMcneil](https://github.com/davidMcneil)) <!-- 1.6.53 -->
- read hook stdout/err allowing for lossy utf8 strings [#7724](https://github.com/habitat-sh/habitat/pull/7724) ([mwrock](https://github.com/mwrock)) <!-- 1.6.46 -->

### New Features & Enhancements
- Use the cli.toml auth_token during package install [#7735](https://github.com/habitat-sh/habitat/pull/7735) ([davidMcneil](https://github.com/davidMcneil)) <!-- 1.6.51 -->
- allow hook extentions in plan [#7740](https://github.com/habitat-sh/habitat/pull/7740) ([mwrock](https://github.com/mwrock)) <!-- 1.6.49 -->

### Merged Pull Requests
- [CI] Bump timeout to 45 minutes [#7757](https://github.com/habitat-sh/habitat/pull/7757) ([christophermaier](https://github.com/christophermaier)) <!-- 1.6.56 -->
- [REFACTOR] Store service spec in Service struct [#7752](https://github.com/habitat-sh/habitat/pull/7752) ([christophermaier](https://github.com/christophermaier)) <!-- 1.6.55 -->
- Restore and deprecate update period env vars [#7756](https://github.com/habitat-sh/habitat/pull/7756) ([davidMcneil](https://github.com/davidMcneil)) <!-- 1.6.54 -->
- Improve serde usage [#7732](https://github.com/habitat-sh/habitat/pull/7732) ([davidMcneil](https://github.com/davidMcneil)) <!-- 1.6.52 -->
- fix e2e failures [#7742](https://github.com/habitat-sh/habitat/pull/7742) ([mwrock](https://github.com/mwrock)) <!-- 1.6.50 -->
- Supervisor update config [#7733](https://github.com/habitat-sh/habitat/pull/7733) ([davidMcneil](https://github.com/davidMcneil)) <!-- 1.6.48 -->
- use powershell 7.0.1 [#7730](https://github.com/habitat-sh/habitat/pull/7730) ([mwrock](https://github.com/mwrock)) <!-- 1.6.47 -->
- Update rust to 1.43.1 [#7728](https://github.com/habitat-sh/habitat/pull/7728) ([davidMcneil](https://github.com/davidMcneil)) <!-- 1.6.45 -->
- Remove libarchive and Vendor openssl [#7710](https://github.com/habitat-sh/habitat/pull/7710) ([davidMcneil](https://github.com/davidMcneil)) <!-- 1.6.44 -->
- Fix typos and refresh in cli help [#7718](https://github.com/habitat-sh/habitat/pull/7718) ([jsirex](https://github.com/jsirex)) <!-- 1.6.43 -->
- [CI] Re-enable skipped verify builds affected by core-plans refresh  [#7649](https://github.com/habitat-sh/habitat/pull/7649) ([christophermaier](https://github.com/christophermaier)) <!-- 1.6.42 -->
- Rustfmt and Nightly Rust Bump to nightly-2020-05-15 [#7713](https://github.com/habitat-sh/habitat/pull/7713) ([chef-expeditor[bot]](https://github.com/chef-expeditor[bot])) <!-- 1.6.42 -->
- Cargo Update [#7715](https://github.com/habitat-sh/habitat/pull/7715) ([chef-expeditor[bot]](https://github.com/chef-expeditor[bot])) <!-- 1.6.41 -->
- Automated update of Habitat Documentation [#7714](https://github.com/habitat-sh/habitat/pull/7714) ([chef-expeditor[bot]](https://github.com/chef-expeditor[bot])) <!-- 1.6.41 -->
- Update Changelog [#7716](https://github.com/habitat-sh/habitat/pull/7716) ([christophermaier](https://github.com/christophermaier)) <!-- 1.6.40 -->