chore(release): 2.8.0 [skip ci]

# [2.8.0](https://gitlab.com/to-be-continuous/terraform/compare/2.7.1...2.8.0) (2022-06-29)

### Features

* add implicit Backend configuration ([66cf5557](https://gitlab.com/to-be-continuous/terraform/commit/66cf55570075d86c5b83a09bbee65f7dba679ea4))
* add implicit tfvars support ([eada2c7b](https://gitlab.com/to-be-continuous/terraform/commit/eada2c7ba899b7083e3a2efadbbac7cfbb73b2cf))