update lsi to use shutil to get terminal size

Author: js-d-coder

lsi

@@ -14,9 +14,10 @@ but if you aren't one of them, here you go.
 import argparse
 import os
 import sys
+import shutil
 
 # get size of the terminal for output in table format
-terminalRowSize, terminalColumnSize = os.popen('stty size', 'r').read().split()
+terminalRowSize, terminalColumnSize = shutil.get_terminal_size()
 
 parser = argparse.ArgumentParser(description=
 """ls command alternative.