docs: def set_version(old_version, new_version):
          """
          Write new version into VERSION_FILE
          """
          try:
              if APISettings.DEBUG:
                  Shell.debug('* ' + old_version + ' --> ' + new_version)
                  return True
  
              for line in fileinput.input(os.path.abspath(APISettings.VERSION_FILE), inplace=True):
                  print(line.replace(old_version, new_version), end='')
              Shell.success('* ' + old_version + ' --> ' + new_version)
          except FileNotFoundError:
              Shell.warn('File not found!')