Too many dev related listed as regular dependencies

[mfranzke]

I am using Pattern Lab Node v5.15.3 on Mac, with Node v12.13.1, using a handlebars Edition with the demo patterns installed.

Expected Behavior

All build, testing and release dependencies of the different packages are included as devDependencies within the package.json files and not as dependencies. This would both shrink the weight and amount of installed (and partly outdated) packages for consumers of the pattern lab packages.

Actual Behavior

Some of the dependencies are listed as dependencies instead of devDependencies.

Steps to Reproduce

Install pattern lab with npm create pattern-lab and have a look at the node_modules folder, that contains dependencies like webpack, that are only used during preparding the package @pattern-lab/uikit-workshop for publishing.