Support experimental html formats in npm validator. (#11963)
Support experimental html formats in npm validator. (#11963)

validator builds.
ADITION/amphtml,gumgum/amphtml,BenDz/amphtml,zhouyx/amphtml,lannka/amphtml,adup-tech/amphtml,smartadserver/amphtml,chaveznvg/amphtml,yandex-pcode/amphtml,gumgum/amphtml,src-code/amphtml,jpettitt/amphtml,mhc-gh/amphtml,engtat/amphtml,jridgewell/amphtml,nexxtv/amphtml,dotandads/amphtml,jridgewell/amphtml,BenDz/amphtml,danielrozenberg/amphtml,tlong2/amphtml,lannka/amphtml,kamtschatka/amphtml,comScore/amphtml,kixer-com/amphtml,zhouyx/amphtml,engtat/amphtml,powdercloud/amphtml,sharethrough/amphtml,media-net/amphtml,zhangsu/amphtml,zhouyx/amphtml,donttrustthisbot/amphtml,honeybadgerdontcare/amphtml,yieldbot/amphtml,sriramkrish85/amphtml,shawnbuso/amphtml,tlong2/amphtml,aghassemi/amphtml,dotandads/amphtml,jpettitt/amphtml,pedjoni8/amphtml,prateekbh/amphtml,adup-tech/amphtml,comScore/amphtml,mhc-gh/amphtml,rajkumarsrk/amphtml,nexxtv/amphtml,Gregable/amphtml,dotandads/amphtml,alanorozco/amphtml,rajkumarsrk/amphtml,prateekbh/amphtml,shawnbuso/amphtml,yieldbot/amphtml,voyagegroup/amphtml,rajkumarsrk/amphtml,jmadler/amphtml,powdercloud/amphtml,sebastianbenz/amphtml,sriramkrish85/amphtml,ampproject/amphtml,alanorozco/amphtml,laterpay/amphtml,clawr/amphtml,danielrozenberg/amphtml,koshka/amphtml,bpaduch/amphtml,shawnbuso/amphtml,kixer-com/amphtml,ampproject/amphtml,engtat/amphtml,prateekbh/amphtml,shawnbuso/amphtml,dotandads/amphtml,jpettitt/amphtml,ampproject/amphtml,media-net/amphtml,alanorozco/amphtml,rsimha-amp/amphtml,aghassemi/amphtml,tlong2/amphtml,ADITION/amphtml,laterpay/amphtml,koshka/amphtml,Gregable/amphtml,voyagegroup/amphtml,cvializ/amphtml,cory-work/amphtml,kamtschatka/amphtml,zhangsu/amphtml,rsimha-amp/amphtml,ADITION/amphtml,techhtml/amphtml,comScore/amphtml,alanorozco/amphtml,luciancrasovan/amphtml,src-code/amphtml,honeybadgerdontcare/amphtml,luciancrasovan/amphtml,widespace-os/amphtml,kamtschatka/amphtml,pedjoni8/amphtml,ampproject/amphtml,taboola/amphtml,gumgum/amphtml,koshka/amphtml,voyagegroup/amphtml,smartadserver/amphtml,chaveznvg/amphtml,cory-work/amphtml,erwinmombay/amphtml,cory-work/amphtml,camelburrito/amphtml,gumgum/amphtml,prateekbh/amphtml,jridgewell/amphtml,zhangsu/amphtml,aghassemi/amphtml,pedjoni8/amphtml,lannka/amphtml,erwinmombay/amphtml,jridgewell/amphtml,BenDz/amphtml,zhangsu/amphtml,bpaduch/amphtml,sharethrough/amphtml,pedjoni8/amphtml,kamtschatka/amphtml,mhc-gh/amphtml,powdercloud/amphtml,jmadler/amphtml,powdercloud/amphtml,kamtschatka/amphtml,mhc-gh/amphtml,nexxtv/amphtml,laterpay/amphtml,pedjoni8/amphtml,zhouyx/amphtml,cvializ/amphtml,ampproject/amphtml,taboola/amphtml,clawr/amphtml,kamtschatka/amphtml,erwinmombay/amphtml,widespace-os/amphtml,camelburrito/amphtml,jridgewell/amphtml,media-net/amphtml,bpaduch/amphtml,luciancrasovan/amphtml,jmadler/amphtml,camelburrito/amphtml,nexxtv/amphtml,dotandads/amphtml,aghassemi/amphtml,taboola/amphtml,camelburrito/amphtml,tlong2/amphtml,Gregable/amphtml,ADITION/amphtml,donttrustthisbot/amphtml,aghassemi/amphtml,mhc-gh/amphtml,sharethrough/amphtml,gumgum/amphtml,adup-tech/amphtml,cory-work/amphtml,nexxtv/amphtml,honeybadgerdontcare/amphtml,yandex-pcode/amphtml,jpettitt/amphtml,jmadler/amphtml,powdercloud/amphtml,kixer-com/amphtml,comScore/amphtml,yieldmo/amphtml,sriramkrish85/amphtml,laterpay/amphtml,clawr/amphtml,yandex-pcode/amphtml,jpettitt/amphtml,yandex-pcode/amphtml,shawnbuso/amphtml,zhouyx/amphtml,smartadserver/amphtml,luciancrasovan/amphtml,donttrustthisbot/amphtml,rajkumarsrk/amphtml,widespace-os/amphtml,yandex-pcode/amphtml,sebastianbenz/amphtml,yieldbot/amphtml,cory-work/amphtml,prateekbh/amphtml,techhtml/amphtml,danielrozenberg/amphtml,alanorozco/amphtml,techhtml/amphtml,laterpay/amphtml,Gregable/amphtml,pedjoni8/amphtml,engtat/amphtml,cory-work/amphtml,gumgum/amphtml,lannka/amphtml,camelburrito/amphtml,mhc-gh/amphtml,yieldbot/amphtml,sriramkrish85/amphtml,bpaduch/amphtml,danielrozenberg/amphtml,jpettitt/amphtml,danielrozenberg/amphtml,alanorozco/amphtml,yieldmo/amphtml,yieldbot/amphtml,zhouyx/amphtml,jpettitt/amphtml,sharethrough/amphtml,jpettitt/amphtml,honeybadgerdontcare/amphtml,sebastianbenz/amphtml,taboola/amphtml,smartadserver/amphtml,mhc-gh/amphtml,media-net/amphtml,yieldmo/amphtml,widespace-os/amphtml,engtat/amphtml,sebastianbenz/amphtml,cvializ/amphtml,rajkumarsrk/amphtml,danielrozenberg/amphtml,koshka/amphtml,clawr/amphtml,yandex-pcode/amphtml,BenDz/amphtml,honeybadgerdontcare/amphtml,adup-tech/amphtml,bpaduch/amphtml,bpaduch/amphtml,yandex-pcode/amphtml,cory-work/amphtml,camelburrito/amphtml,bpaduch/amphtml,donttrustthisbot/amphtml,erwinmombay/amphtml,luciancrasovan/amphtml,yieldmo/amphtml,src-code/amphtml,BenDz/amphtml,clawr/amphtml,dotandads/amphtml,koshka/amphtml,zhouyx/amphtml,alanorozco/amphtml,sriramkrish85/amphtml,techhtml/amphtml,kixer-com/amphtml,jmadler/amphtml,koshka/amphtml,rajkumarsrk/amphtml,media-net/amphtml,nexxtv/amphtml,honeybadgerdontcare/amphtml,shawnbuso/amphtml,techhtml/amphtml,techhtml/amphtml,cvializ/amphtml,widespace-os/amphtml,voyagegroup/amphtml,prateekbh/amphtml,src-code/amphtml,luciancrasovan/amphtml,tlong2/amphtml,sriramkrish85/amphtml,taboola/amphtml,zhangsu/amphtml,chaveznvg/amphtml,comScore/amphtml,Gregable/amphtml,danielrozenberg/amphtml,aghassemi/amphtml,chaveznvg/amphtml,rajkumarsrk/amphtml,laterpay/amphtml,danielrozenberg/amphtml,powdercloud/amphtml,rsimha-amp/amphtml,src-code/amphtml,BenDz/amphtml,rsimha-amp/amphtml,lannka/amphtml,engtat/amphtml,lannka/amphtml,adup-tech/amphtml,gumgum/amphtml,engtat/amphtml,donttrustthisbot/amphtml,erwinmombay/amphtml,sharethrough/amphtml,ADITION/amphtml,media-net/amphtml,taboola/amphtml,voyagegroup/amphtml,yieldbot/amphtml,powdercloud/amphtml,jridgewell/amphtml,yieldmo/amphtml,sebastianbenz/amphtml,src-code/amphtml,nexxtv/amphtml,prateekbh/amphtml,smartadserver/amphtml,camelburrito/amphtml,clawr/amphtml,Gregable/amphtml,donttrustthisbot/amphtml,yieldmo/amphtml,ampproject/amphtml,sebastianbenz/amphtml,alanorozco/amphtml,rsimha-amp/amphtml,smartadserver/amphtml,erwinmombay/amphtml,Gregable/amphtml,chaveznvg/amphtml,clawr/amphtml,widespace-os/amphtml,shawnbuso/amphtml,luciancrasovan/amphtml,media-net/amphtml,tlong2/amphtml,kixer-com/amphtml,jmadler/amphtml,cvializ/amphtml,comScore/amphtml,kixer-com/amphtml,rsimha-amp/amphtml,donttrustthisbot/amphtml,lannka/amphtml,rsimha-amp/amphtml,taboola/amphtml,Gregable/amphtml,sharethrough/amphtml,zhangsu/amphtml,voyagegroup/amphtml,ampproject/amphtml,voyagegroup/amphtml,ampproject/amphtml,jridgewell/amphtml,chaveznvg/amphtml,kixer-com/amphtml,comScore/amphtml,yieldmo/amphtml,media-net/amphtml,mhc-gh/amphtml,honeybadgerdontcare/amphtml,cvializ/amphtml,adup-tech/amphtml