fix: remove extra blank line in terminal when output is empty

[EvgenyWas]

The simpler solution is to use process.stdout.moveCursor() and process.stdout.clearLine() directly. However, if TTY is not available we can not use those methods and consuming readline is a better-supported solution to do that.

Resolves #363

[ai]

Am I right than in non-TTY env it will do nothing (double line, which is OK)?

[EvgenyWas]

Am I right than in non-TTY env it will do nothing (double line, which is OK)?

No, it will work as expected. I mentioned TTY here just because process.stdout.moveCursor() was failing with the following error TypeError: process.stdout.moveCursor is not a function because the process is being run out of a TTY context during running tests. The usage of readline is more reliable here.