refac: transformation formula for diagram adjusted 1) the length of the segments of a polyline are now summed 2) each point has an x coordinate according to the length of the polyline up to this point 3) testdata were hand crafted and used as basis for plausibility checks

module.exports = {
  env: {
    jest: true
  },
  rules: {
    'import/no-extraneous-dependencies': 'off'
  }
}