Update 03-cli.md
Update 03-cli.md

Package `fabpot/php-cs-fixer` is, so I replaced it with `friendsofphp/php-cs-fixer`.
andrerom/composer,alcohol/composer,milleruk/composer,naderman/composer,stefangr/composer,pierredup/composer,floverdevel/composer,stof/composer,slbmeh/composer,SpacePossum/composer,vdm-io/composer,localheinz/composer,nicolas-grekas/composer,gencer/composer,staabm/composer,fabpot/composer,johnstevenson/composer,erasys/composer,composer/composer,dzuelke/composer