add tip about code coverage - fixes #94
add tip about code coverage - fixes #94

floatdrop/ava,andywer/ava-ts,vdemedes/ava,BarryThePenguin/ava,avajs/ava,sindresorhus/ava,Collinslenjo/ava,andywer/ava-ts,Collinslenjo/ava,avajs/ava