Typo about «platform not supporting…»

BTW, I thought my platform was OK with this (Debian).
What platform support/don't support interactive reading?
Fix: typo in message
Merge branch 'patch-1' of https://github.com/Grahack/readline-sync into pull-request-master

Conflicts:
	lib/readline-sync.js

Typo about platform not supporting
Merge branch 'pull-request-master'