Update CONTRIBUTING.md with respect to coverage check [skip ci] (#5329)
Update CONTRIBUTING.md with respect to coverage check [skip ci] (#5329)


Skillupco/babel,kellyselden/babel,chicoxyzzy/babel,guybedford/babel,chicoxyzzy/babel,existentialism/babel,chicoxyzzy/babel,kaicataldo/babel,PolymerLabs/babel,STRML/babel,babel/babel,hulkish/babel,kellyselden/babel,samwgoldman/babel,babel/babel,hulkish/babel,jridgewell/babel,maurobringolf/babel,jridgewell/babel,hzoo/babel,hzoo/babel,hzoo/babel,jridgewell/babel,PolymerLabs/babel,jridgewell/babel,existentialism/babel,kellyselden/babel,ccschneidr/babel,Skillupco/babel,samwgoldman/babel,hulkish/babel,kedromelon/babel,claudiopro/babel,zjmiller/babel,kellyselden/babel,kaicataldo/babel,chicoxyzzy/babel,claudiopro/babel,zjmiller/babel,samwgoldman/babel,Skillupco/babel,shuhei/babel,guybedford/babel,babel/babel,hzoo/babel,maurobringolf/babel,Skillupco/babel,vadzim/babel,shuhei/babel,kaicataldo/babel,STRML/babel,babel/babel,PolymerLabs/babel,claudiopro/babel,kedromelon/babel,vadzim/babel,maurobringolf/babel,hulkish/babel,existentialism/babel,ccschneidr/babel,kaicataldo/babel,kedromelon/babel,guybedford/babel,shuhei/babel