Terraform-compliance

* Upgraded `radish-bdd` to `0.13.1` which includes fix for using escaped PIPE (`|`) characters within the features. ([Example](https://github.com/eerkunt/terraform-compliance/blob/master/example/example_01/aws/tags.feature)) ([#110](https://github.com/eerkunt/terraform-compliance/issues/110))

* Include the Terraform binary in the Docker container for use on non-Linux host operating systems ([102](https://github.com/eerkunt/terraform-compliance/issues/102))

* Added a new step: _its value must/must not be null_ ([Example](https://github.com/eerkunt/terraform-compliance/blob/master/example/example_01/aws/restrict_resource_creation.feature)) ([#106](https://github.com/eerkunt/terraform-compliance/issues/106)))
* Added support for `data` definitions. ([105](https://github.com/eerkunt/terraform-compliance/issues/111))

* Added a new step : [it_fails](https://github.com/eerkunt/terraform-compliance/blob/master/example/example_01/aws/restrict_resource_creation.feature) ([#105](https://github.com/eerkunt/terraform-compliance/issues/105))

* Improved `contains` steps where in some cases 'key' and 'value' dict keys exist, instead of value of key as a key.

* Fixed a problem where mounted resources creating problem on identifying resources that doesn't have `tags` capability. ([107](https://github.com/eerkunt/terraform-compliance/issues/107))