Convert excel file to csv file

install

cargo install krep

USAGE: 
        kerp <regex pattern> <pipe or input>
        kerp <regex pattern> -F <files..>
Example:
cat README.md | krep decode
krep https -F Cargo.toml README.md   =>find https
krep '[0-9]{4}-[0-9]{1,}-[0-9]{1,}' -F README.md   =>find date