refacto(css/pulse-animation): add 'alternate' and edit keyframes#218

Mathys-Gasnier merged 2 commits intoquicksnip-dev:mainquicksnip-dev/quicksnip:mainfrom

alanb4rt:refacto/css/pulse-animationalanb4rt/quicksnip:refacto/css/pulse-animationCopy head branch name to clipboard