No need for any installation, just run this command (Requires say or espeak)
bash -c "$(curl -fsSL https://raw.githubusercontent.com/bratanon/terminal-sing/master/terminal_sing.sh)" [lyric name without .lyric]
To use this in Windows, you have to download the terminal_sing.vbs to your local drive and open it from the windows terminal a.k.a cmd I think.
terminal_sing.vbs [lyric name without .lyric]
Lyrics can be found in the /lyric directory.