bugfix: removed highline from dependencies, not necessary anymore

Signed-off-by: Dominik Richter <dominik.richter@gmail.com>
improvement: added changelog file

Signed-off-by: Dominik Richter <dominik.richter@gmail.com>
version bump to 0.4

Signed-off-by: Dominik Richter <dominik.richter@gmail.com>