cleanup build folder #80
Description
What is the current state
The npm package contains a lot of files. These files are not used from the users. There should be no dev configs like linter or circle ci files in the production output.
How it should be
Me as a user I want to access the min and max function. The rest does not matter to me. Plus the package.json, types.d.ts and the Readme.md of course.
With the following output the package will do the same as before and will get lighter which is always a nice thing 🙂
(history.md could also be removed but thats a matter of taste)
