changes:
- including spinner.indent in the calculation of lineCount

- calling updateLineCount in indent setter

- cursorTo is called the minimal number of times necessary: to set the cursor position to the start of the line to set up the clearLine(1) loop, and after the loop to reset the cursor (if necessary)

- clearLine(0) and clearLine(-1) cause flickering issues in Windows terminals when executed on an interval. Using clearLine(1) resolves that issue.