This release brings `strict` mode to Yamale. With strict mode, elements defined in your YAML that aren't specified in the schema will cause a validation error. You can also validate dynamic keys and include validators.
We've bumped the version to 2.x due to an incompatibility. In the 1.x branch, if all the children of a node are optional, then the parent is optional as well. In the 2.x branch, the parent will no longer be optional in this case.