🏗 Print progress ●'s for `gulp visual-diff` on Travis (#16909)
🏗 Print progress ●'s for `gulp visual-diff` on Travis (#16909)

* Print progress ●'s for `gulp visual-diff` on Travis

* Prefix ●'s with the config name

* :%s/green/cyan/

adup-tech/amphtml,jpettitt/amphtml,chaveznvg/amphtml,nexxtv/amphtml,alanorozco/amphtml,voyagegroup/amphtml,dotandads/amphtml,lannka/amphtml,kamtschatka/amphtml,koshka/amphtml,sharethrough/amphtml,jpettitt/amphtml,taboola/amphtml,danielrozenberg/amphtml,aghassemi/amphtml,chaveznvg/amphtml,koshka/amphtml,BenDz/amphtml,danielrozenberg/amphtml,lannka/amphtml,rsimha-amp/amphtml,ampproject/amphtml,rsimha-amp/amphtml,cory-work/amphtml,taboola/amphtml,honeybadgerdontcare/amphtml,kamtschatka/amphtml,zhouyx/amphtml,techhtml/amphtml,yandex-pcode/amphtml,erwinmombay/amphtml,voyagegroup/amphtml,widespace-os/amphtml,Gregable/amphtml,sebastianbenz/amphtml,techhtml/amphtml,rsimha-amp/amphtml,lannka/amphtml,sebastianbenz/amphtml,prateekbh/amphtml,src-code/amphtml,BenDz/amphtml,chaveznvg/amphtml,zhouyx/amphtml,honeybadgerdontcare/amphtml,yandex-pcode/amphtml,BenDz/amphtml,prateekbh/amphtml,adup-tech/amphtml,sharethrough/amphtml,zhangsu/amphtml,widespace-os/amphtml,cvializ/amphtml,aghassemi/amphtml,Gregable/amphtml,jridgewell/amphtml,chaveznvg/amphtml,yieldbot/amphtml,koshka/amphtml,prateekbh/amphtml,cvializ/amphtml,tlong2/amphtml,Gregable/amphtml,tlong2/amphtml,laterpay/amphtml,pedjoni8/amphtml,alanorozco/amphtml,techhtml/amphtml,nexxtv/amphtml,yandex-pcode/amphtml,sharethrough/amphtml,danielrozenberg/amphtml,voyagegroup/amphtml,taboola/amphtml,media-net/amphtml,honeybadgerdontcare/amphtml,nexxtv/amphtml,honeybadgerdontcare/amphtml,media-net/amphtml,smartadserver/amphtml,BenDz/amphtml,jmadler/amphtml,honeybadgerdontcare/amphtml,mhc-gh/amphtml,mhc-gh/amphtml,ampproject/amphtml,src-code/amphtml,media-net/amphtml,smartadserver/amphtml,kamtschatka/amphtml,ampproject/amphtml,alanorozco/amphtml,yandex-pcode/amphtml,cvializ/amphtml,jridgewell/amphtml,adup-tech/amphtml,cvializ/amphtml,danielrozenberg/amphtml,taboola/amphtml,yandex-pcode/amphtml,jridgewell/amphtml,prateekbh/amphtml,laterpay/amphtml,dotandads/amphtml,lannka/amphtml,voyagegroup/amphtml,rsimha-amp/amphtml,mhc-gh/amphtml,aghassemi/amphtml,honeybadgerdontcare/amphtml,chaveznvg/amphtml,Gregable/amphtml,voyagegroup/amphtml,erwinmombay/amphtml,koshka/amphtml,jpettitt/amphtml,zhangsu/amphtml,sharethrough/amphtml,laterpay/amphtml,ampproject/amphtml,zhouyx/amphtml,lannka/amphtml,BenDz/amphtml,laterpay/amphtml,prateekbh/amphtml,chaveznvg/amphtml,tlong2/amphtml,prateekbh/amphtml,zhouyx/amphtml,rsimha-amp/amphtml,sebastianbenz/amphtml,cvializ/amphtml,yieldbot/amphtml,yandex-pcode/amphtml,techhtml/amphtml,yieldbot/amphtml,danielrozenberg/amphtml,pedjoni8/amphtml,mhc-gh/amphtml,jmadler/amphtml,smartadserver/amphtml,widespace-os/amphtml,pedjoni8/amphtml,dotandads/amphtml,laterpay/amphtml,kamtschatka/amphtml,widespace-os/amphtml,cory-work/amphtml,yieldbot/amphtml,erwinmombay/amphtml,media-net/amphtml,yieldbot/amphtml,jmadler/amphtml,taboola/amphtml,techhtml/amphtml,rsimha-amp/amphtml,cory-work/amphtml,jpettitt/amphtml,src-code/amphtml,erwinmombay/amphtml,sebastianbenz/amphtml,danielrozenberg/amphtml,adup-tech/amphtml,jpettitt/amphtml,pedjoni8/amphtml,zhangsu/amphtml,kamtschatka/amphtml,taboola/amphtml,src-code/amphtml,mhc-gh/amphtml,techhtml/amphtml,smartadserver/amphtml,rsimha-amp/amphtml,cory-work/amphtml,zhouyx/amphtml,jmadler/amphtml,jridgewell/amphtml,zhouyx/amphtml,voyagegroup/amphtml,widespace-os/amphtml,alanorozco/amphtml,cory-work/amphtml,sharethrough/amphtml,jpettitt/amphtml,alanorozco/amphtml,alanorozco/amphtml,Gregable/amphtml,zhouyx/amphtml,lannka/amphtml,nexxtv/amphtml,jmadler/amphtml,ampproject/amphtml,pedjoni8/amphtml,dotandads/amphtml,sebastianbenz/amphtml,media-net/amphtml,honeybadgerdontcare/amphtml,jmadler/amphtml,sebastianbenz/amphtml,ampproject/amphtml,adup-tech/amphtml,jridgewell/amphtml,nexxtv/amphtml,yieldbot/amphtml,voyagegroup/amphtml,taboola/amphtml,Gregable/amphtml,widespace-os/amphtml,mhc-gh/amphtml,dotandads/amphtml,laterpay/amphtml,mhc-gh/amphtml,ampproject/amphtml,kamtschatka/amphtml,Gregable/amphtml,aghassemi/amphtml,src-code/amphtml,jpettitt/amphtml,media-net/amphtml,tlong2/amphtml,zhangsu/amphtml,aghassemi/amphtml,yandex-pcode/amphtml,sharethrough/amphtml,adup-tech/amphtml,koshka/amphtml,BenDz/amphtml,media-net/amphtml,erwinmombay/amphtml,cvializ/amphtml,alanorozco/amphtml,lannka/amphtml,jpettitt/amphtml,Gregable/amphtml,nexxtv/amphtml,cory-work/amphtml,dotandads/amphtml,danielrozenberg/amphtml,ampproject/amphtml,zhangsu/amphtml,smartadserver/amphtml,media-net/amphtml,smartadserver/amphtml,mhc-gh/amphtml,danielrozenberg/amphtml,jridgewell/amphtml,tlong2/amphtml,pedjoni8/amphtml,prateekbh/amphtml,erwinmombay/amphtml,jridgewell/amphtml,cory-work/amphtml,src-code/amphtml,aghassemi/amphtml,nexxtv/amphtml,tlong2/amphtml,alanorozco/amphtml,zhangsu/amphtml,koshka/amphtml