v1.6.1

• There's now a json schema for the (json) output - and there's automated tests in place to make sure dependency-cruiser keeps adhering to it.
• There's a json schema for the rules file format as well. In stead of silently ignoring unexpected content, dependency-cruiser will now stop with an error.
• The package published at npm lost some weight (~0.5Mb) because the .npmignore now contains more files that are not strictly necessary for using dependency-cruiser.