fix(main): make --subtitle optional
fix(main): make --subtitle optional

clog-tool/clog-cli,semantic-rs/clog-lib,clog-tool/clog-lib,semantic-rs/clog-lib,Vinatorul/clog-cli,kentcdodds/clog,Vinatorul/clog-lib,Vinatorul/clog-lib,kbknapp/clog,kentcdodds/clog,thoughtram/clog,badboy/clog-lib,clog-tool/clog-cli,badboy/clog-lib