add update task or probably hela-config-tunnckocore-update

[tunnckoCore]

remove everything from cwd, but not src, test and few fields of package.json like

• name
• description
• repository
• nspId
• licenseStart
• dependencies
• devDependencies
• keywords

Everything other scaffold from templates and such. The .verb.md should also be in one place (here or in the other config) and run Verb with verb --readme "path to README.md template"