v0.3.0: Updated Plugin API

BREAKING CHANGE to the plugin api.
A parser function no returns all elements of a template.

func parser(
	name string,
	data string,
) (
	conditions kombustionTypes.TemplateObject,
	metadata kombustionTypes.TemplateObject,
	mappings kombustionTypes.TemplateObject,
	outputs kombustionTypes.TemplateObject,
	parameters kombustionTypes.TemplateObject,
	resources kombustionTypes.TemplateObject,
	transform kombustionTypes.TemplateObject,
	errors []error,
)