v1.3.0

Changelog

991dfb9 Add --lower flag and capitalize first letter by default
08420e9 Add random number and --remove-number flag
7e8fdda Add version command and start using semantic versioning (#25)
769c4e3 Remove shorthand letter flags
622f726 Rename --add to --add-lang and remove --lang flag
ced1d9e Upgrade to Go 1.16 and add new embed directive (#24)