* **maps:** move tls_policy and transport to mapping section ([06276fd](https://github.com/saltstack-formulas/postfix-formula/commit/06276fd7431e1675795be95c0c8ebb01772ea740))
### Continuous Integration
* **kitchen+travis:** use latest pre-salted images ([b364744](https://github.com/saltstack-formulas/postfix-formula/commit/b364744e40b484397fea5c2c1767f77728649de8))
### BREAKING CHANGES
* **maps:** `transport` and `tls_policy` keys in `postfix:config` have been moved to the standard `postfix:mapping`.
* make necessary modifications to get working on `salt-ssh` ([34a112f](https://github.com/saltstack-formulas/postfix-formula/commit/34a112faabba46d95b102afa3add5b797dda2ce1)), closes [/freenode.logbot.info/saltstack-formulas/20200507#c3819526-c3819581](https://github.com//freenode.logbot.info/saltstack-formulas/20200507/issues/c3819526-c3819581) [/freenode.logbot.info/saltstack-formulas/20200508#c3826763-c3826995](https://github.com//freenode.logbot.info/saltstack-formulas/20200508/issues/c3826763-c3826995)
* **release.config.js:** use full commit hash in commit link [skip ci] ([ffbe5aa](https://github.com/saltstack-formulas/postfix-formula/commit/ffbe5aad13e73a4e3aa1c6dbd24488ebd73436ee))
### Continuous Integration
* **gemfile:** restrict `train` gem version until upstream fix [skip ci] ([80cdd9d](https://github.com/saltstack-formulas/postfix-formula/commit/80cdd9d202b6dbbc43aa02025bb7d9738aad8ee7))
* **gemfile.lock:** add to repo with updated `Gemfile` [skip ci] ([497221d](https://github.com/saltstack-formulas/postfix-formula/commit/497221d1de7356cb031f78597781fa05897ca0a9))
* **kitchen:** avoid using bootstrap for `master` instances [skip ci] ([708b0a5](https://github.com/saltstack-formulas/postfix-formula/commit/708b0a51d9378ef44c0df125f532deea44f07044))
* **kitchen:** use `debian-10-master-py3` instead of `develop` [skip ci] ([90098c0](https://github.com/saltstack-formulas/postfix-formula/commit/90098c0cdfa856f9e3ca7772e8fb52e014d70d55))
* **kitchen:** use `develop` image until `master` is ready (`amazonlinux`) [skip ci] ([df76c72](https://github.com/saltstack-formulas/postfix-formula/commit/df76c72dcee4ff87f104b13880ddc32b163e2db6))
* **travis:** opt-in to `dpl v2` to complete build config validation [skip ci] ([8f4db70](https://github.com/saltstack-formulas/postfix-formula/commit/8f4db70ece851dea547550cfabb4b770eaf0796b))
* **travis:** quote pathspecs used with `git ls-files` [skip ci] ([6d18d1d](https://github.com/saltstack-formulas/postfix-formula/commit/6d18d1dc93c92c4ba85f340c541d3a69f557d74e))
* **travis:** run `shellcheck` during lint job [skip ci] ([29efb81](https://github.com/saltstack-formulas/postfix-formula/commit/29efb819fc9d4bf273b57c15d01dfb390642b3d5))
* **travis:** update `salt-lint` config for `v0.0.10` [skip ci] ([b23168e](https://github.com/saltstack-formulas/postfix-formula/commit/b23168e69ec8823ad9382b6c9c3be8f743d3b8e3))
* **travis:** use `major.minor` for `semantic-release` version [skip ci] ([964e3ef](https://github.com/saltstack-formulas/postfix-formula/commit/964e3ef0fa6613380c56b1b2044e6f37dd797c6c))
* **travis:** use build config validation (beta) [skip ci] ([1ab8692](https://github.com/saltstack-formulas/postfix-formula/commit/1ab8692f31bdfcf5a24d7049c254d1b71d090e21))
* **workflows/commitlint:** add to repo [skip ci] ([43a7353](https://github.com/saltstack-formulas/postfix-formula/commit/43a7353caec2908e1d6aabab11c198c1806412f5))
### Documentation
* **contributing:** remove to use org-level file instead [skip ci] ([a33757a](https://github.com/saltstack-formulas/postfix-formula/commit/a33757a6ad445fc7e209f32c6ceb5b2309e11d03))
* **readme:** update link to `CONTRIBUTING` [skip ci] ([50b9808](https://github.com/saltstack-formulas/postfix-formula/commit/50b9808a3bd094de30439ff788b6f58ea72051ba))
