celo-0.4.0 is not a library.
celo
Steganography tool to hide files, images and text inside other images
Usage
Usage: celo <COMMAND>
Commands:
image
text
file
help Print this message or the help of the given subcommand(s)
Options:
-h, --help Print help
-V, --version Print version
Building
Installation
Or you can grab the latest binary for windows or linux from the actions tab.