Add @viewport (inc -o-/-ms-) to syntax highlighter
Add @viewport (inc -o-/-ms-) to syntax highlighter

Changes:
* support @viewport at-rules
* add min/max/user-zoom to property list
* add portrait and landscape to property value list

Currently I’m just using the property list for valid descriptors within the viewport at-rule, as that is what the file is also doing for font-face at-rule. Ideally they'd be split out to only accept the valid descriptors in the future.

gagangupt16/vscode,cleidigh/vscode,gagangupt16/vscode,edumunoz/vscode,the-ress/vscode,hoovercj/vscode,gagangupt16/vscode,ioklo/vscode,dersia/vscode,Krzysztof-Cieslak/vscode,hoovercj/vscode,eklavyamirani/vscode,stringham/vscode,0xmohit/vscode,microlv/vscode,charlespierce/vscode,0xmohit/vscode,the-ress/vscode,williamcspace/vscode,veeramarni/vscode,jchadwick/vscode,Krzysztof-Cieslak/vscode,mjbvz/vscode,jchadwick/vscode,matthewshirley/vscode,microlv/vscode,rishii7/vscode,radshit/vscode,microsoft/vscode,landonepps/vscode,0xmohit/vscode,joaomoreno/vscode,KattMingMing/vscode,stringham/vscode,veeramarni/vscode,landonepps/vscode,radshit/vscode,joaomoreno/vscode,the-ress/vscode,ups216/vscode,the-ress/vscode,rishii7/vscode,landonepps/vscode,sifue/vscode,joaomoreno/vscode,cleidigh/vscode,stringham/vscode,gagangupt16/vscode,rishii7/vscode,landonepps/vscode,stkb/vscode,microsoft/vscode,hashhar/vscode,f111fei/vscode,rishii7/vscode,Microsoft/vscode,gagangupt16/vscode,f111fei/vscode,gagangupt16/vscode,veeramarni/vscode,microlv/vscode,veeramarni/vscode,eamodio/vscode,stringham/vscode,joaomoreno/vscode,sifue/vscode,rishii7/vscode,landonepps/vscode,Microsoft/vscode,bsmr-x-script/vscode,microsoft/vscode,f111fei/vscode,zyml/vscode,Zalastax/vscode,eamodio/vscode,ups216/vscode,matthewshirley/vscode,ups216/vscode,Zalastax/vscode,KattMingMing/vscode,landonepps/vscode,markrendle/vscode,gagangupt16/vscode,cleidigh/vscode,mjbvz/vscode,ioklo/vscode,cleidigh/vscode,charlespierce/vscode,cra0zy/VSCode,landonepps/vscode,gagangupt16/vscode,edumunoz/vscode,DustinCampbell/vscode,zyml/vscode,sifue/vscode,hungys/vscode,charlespierce/vscode,bsmr-x-script/vscode,rick111111/vscode,sifue/vscode,zyml/vscode,eklavyamirani/vscode,the-ress/vscode,eklavyamirani/vscode,jchadwick/vscode,KattMingMing/vscode,the-ress/vscode,gagangupt16/vscode,edumunoz/vscode,zyml/vscode,alexandrudima/vscode,DustinCampbell/vscode,hungys/vscode,bsmr-x-script/vscode,hoovercj/vscode,0xmohit/vscode,matthewshirley/vscode,f111fei/vscode,ioklo/vscode,Zalastax/vscode,ups216/vscode,hungys/vscode,stringham/vscode,2947721120/vscode,alexandrudima/vscode,SofianHn/vscode,ups216/vscode,zyml/vscode,hoovercj/vscode,the-ress/vscode,sifue/vscode,matthewshirley/vscode,f111fei/vscode,charlespierce/vscode,radshit/vscode,stringham/vscode,hashhar/vscode,jchadwick/vscode,hoovercj/vscode,williamcspace/vscode,matthewshirley/vscode,Krzysztof-Cieslak/vscode,eklavyamirani/vscode,williamcspace/vscode,mjbvz/vscode,jchadwick/vscode,sifue/vscode,mjbvz/vscode,DustinCampbell/vscode,radshit/vscode,sifue/vscode,Krzysztof-Cieslak/vscode,the-ress/vscode,Zalastax/vscode,Microsoft/vscode,microlv/vscode,gagangupt16/vscode,microsoft/vscode,f111fei/vscode,joaomoreno/vscode,radshit/vscode,microlv/vscode,cleidigh/vscode,microsoft/vscode,microsoft/vscode,eamodio/vscode,radshit/vscode,edumunoz/vscode,KattMingMing/vscode,ioklo/vscode,microlv/vscode,microlv/vscode,microsoft/vscode,Microsoft/vscode,zyml/vscode,ups216/vscode,dersia/vscode,zyml/vscode,Microsoft/vscode,veeramarni/vscode,Microsoft/vscode,SofianHn/vscode,hoovercj/vscode,joaomoreno/vscode,matthewshirley/vscode,charlespierce/vscode,zyml/vscode,f111fei/vscode,KattMingMing/vscode,KattMingMing/vscode,edumunoz/vscode,hungys/vscode,edumunoz/vscode,hungys/vscode,microlv/vscode,zyml/vscode,williamcspace/vscode,eamodio/vscode,ioklo/vscode,williamcspace/vscode,ioklo/vscode,gagangupt16/vscode,eklavyamirani/vscode,eamodio/vscode,sifue/vscode,DustinCampbell/vscode,joaomoreno/vscode,f111fei/vscode,eamodio/vscode,cleidigh/vscode,jchadwick/vscode,mjbvz/vscode,bsmr-x-script/vscode,Microsoft/vscode,dersia/vscode,ups216/vscode,landonepps/vscode,KattMingMing/vscode,veeramarni/vscode,f111fei/vscode,jchadwick/vscode,the-ress/vscode,joaomoreno/vscode,charlespierce/vscode,mjbvz/vscode,veeramarni/vscode,DustinCampbell/vscode,KattMingMing/vscode,microsoft/vscode,eamodio/vscode,rishii7/vscode,zyml/vscode,jchadwick/vscode,stringham/vscode,matthewshirley/vscode,rishii7/vscode,ups216/vscode,landonepps/vscode,ups216/vscode,microlv/vscode,KattMingMing/vscode,matthewshirley/vscode,punker76/vscode,bsmr-x-script/vscode,rishii7/vscode,sifue/vscode,the-ress/vscode,zyml/vscode,ioklo/vscode,bsmr-x-script/vscode,mjbvz/vscode,charlespierce/vscode,cleidigh/vscode,veeramarni/vscode,joaomoreno/vscode,sifue/vscode,sifue/vscode,radshit/vscode,hashhar/vscode,charlespierce/vscode,microsoft/vscode,eamodio/vscode,bsmr-x-script/vscode,hoovercj/vscode,markrendle/vscode,Krzysztof-Cieslak/vscode,zyml/vscode,alexandrudima/vscode,rkeithhill/VSCode,hashhar/vscode,microsoft/vscode,Krzysztof-Cieslak/vscode,jchadwick/vscode,charlespierce/vscode,Krzysztof-Cieslak/vscode,rick111111/vscode,Zalastax/vscode,f111fei/vscode,Zalastax/vscode,landonepps/vscode,landonepps/vscode,hungys/vscode,cleidigh/vscode,jchadwick/vscode,ups216/vscode,bsmr-x-script/vscode,rishii7/vscode,edumunoz/vscode,microsoft/vscode,hoovercj/vscode,cleidigh/vscode,landonepps/vscode,matthewshirley/vscode,radshit/vscode,hashhar/vscode,f111fei/vscode,eamodio/vscode,microsoft/vscode,ups216/vscode,eklavyamirani/vscode,DustinCampbell/vscode,mjbvz/vscode,DustinCampbell/vscode,0xmohit/vscode,cleidigh/vscode,joaomoreno/vscode,Zalastax/vscode,williamcspace/vscode,charlespierce/vscode,joaomoreno/vscode,Krzysztof-Cieslak/vscode,ioklo/vscode,the-ress/vscode,williamcspace/vscode,matthewshirley/vscode,zyml/vscode,punker76/vscode,ioklo/vscode,eamodio/vscode,KattMingMing/vscode,hashhar/vscode,microlv/vscode,stkb/vscode,eklavyamirani/vscode,rishii7/vscode,0xmohit/vscode,Zalastax/vscode,0xmohit/vscode,sifue/vscode,eklavyamirani/vscode,bsmr-x-script/vscode,matthewshirley/vscode,williamcspace/vscode,landonepps/vscode,charlespierce/vscode,ups216/vscode,edumunoz/vscode,zyml/vscode,stringham/vscode,eamodio/vscode,hashhar/vscode,edumunoz/vscode,eamodio/vscode,f111fei/vscode,williamcspace/vscode,stringham/vscode,veeramarni/vscode,eklavyamirani/vscode,hashhar/vscode,microsoft/vscode,microsoft/vscode,Microsoft/vscode,joaomoreno/vscode,mjbvz/vscode,hoovercj/vscode,eklavyamirani/vscode,sifue/vscode,radshit/vscode,0xmohit/vscode,hashhar/vscode,gagangupt16/vscode,williamcspace/vscode,hashhar/vscode,ups216/vscode,charlespierce/vscode,stringham/vscode,microsoft/vscode,Krzysztof-Cieslak/vscode,bsmr-x-script/vscode,hashhar/vscode,bsmr-x-script/vscode,eklavyamirani/vscode,2947721120/vscode,hoovercj/vscode,matthewshirley/vscode,hashhar/vscode,rishii7/vscode,eklavyamirani/vscode,hungys/vscode,gagangupt16/vscode,veeramarni/vscode,mjbvz/vscode,eklavyamirani/vscode,gagangupt16/vscode,DustinCampbell/vscode,Microsoft/vscode,KattMingMing/vscode,ioklo/vscode,hungys/vscode,williamcspace/vscode,radshit/vscode,radshit/vscode,rishii7/vscode,f111fei/vscode,the-ress/vscode,DustinCampbell/vscode,eamodio/vscode,Zalastax/vscode,2947721120/vscode,williamcspace/vscode,microlv/vscode,bsmr-x-script/vscode,edumunoz/vscode,hashhar/vscode,bsmr-x-script/vscode,0xmohit/vscode,ups216/vscode,veeramarni/vscode,0xmohit/vscode,eamodio/vscode,DustinCampbell/vscode,charlespierce/vscode,cleidigh/vscode,jchadwick/vscode,Krzysztof-Cieslak/vscode,Zalastax/vscode,Microsoft/vscode,stkb/vscode,the-ress/vscode,stkb/vscode,punker76/vscode,hoovercj/vscode,ioklo/vscode,ioklo/vscode,0xmohit/vscode,hashhar/vscode,Krzysztof-Cieslak/vscode,edumunoz/vscode,Zalastax/vscode,Microsoft/vscode,ioklo/vscode,microlv/vscode,Microsoft/vscode,hungys/vscode,bsmr-x-script/vscode,radshit/vscode,landonepps/vscode,punker76/vscode,Zalastax/vscode,KattMingMing/vscode,matthewshirley/vscode,markrendle/vscode,microlv/vscode,hungys/vscode,ioklo/vscode,jchadwick/vscode,Krzysztof-Cieslak/vscode,radshit/vscode,veeramarni/vscode,edumunoz/vscode,DustinCampbell/vscode,hungys/vscode,microlv/vscode,eamodio/vscode,Krzysztof-Cieslak/vscode,KattMingMing/vscode,gagangupt16/vscode,hoovercj/vscode,williamcspace/vscode,markrendle/vscode,matthewshirley/vscode,cleidigh/vscode,hungys/vscode,hungys/vscode,landonepps/vscode,f111fei/vscode,gagangupt16/vscode,0xmohit/vscode,rishii7/vscode,0xmohit/vscode,mjbvz/vscode,joaomoreno/vscode,mjbvz/vscode,stringham/vscode,sifue/vscode,sifue/vscode,microlv/vscode,ups216/vscode,DustinCampbell/vscode,landonepps/vscode,zyml/vscode,0xmohit/vscode,the-ress/vscode,edumunoz/vscode,hungys/vscode,KattMingMing/vscode,2947721120/vscode,0xmohit/vscode,jchadwick/vscode,williamcspace/vscode,rishii7/vscode,ups216/vscode,rishii7/vscode,Krzysztof-Cieslak/vscode,DustinCampbell/vscode,DustinCampbell/vscode,cleidigh/vscode,joaomoreno/vscode,cleidigh/vscode,f111fei/vscode,hoovercj/vscode,stringham/vscode,f111fei/vscode,Zalastax/vscode,gagangupt16/vscode,Zalastax/vscode,ioklo/vscode,cleidigh/vscode,hashhar/vscode,Microsoft/vscode,hashhar/vscode,Zalastax/vscode,charlespierce/vscode,jchadwick/vscode,edumunoz/vscode,hashhar/vscode,mjbvz/vscode,veeramarni/vscode,veeramarni/vscode,mjbvz/vscode,stringham/vscode,Microsoft/vscode,DustinCampbell/vscode,jchadwick/vscode,williamcspace/vscode,Microsoft/vscode,eamodio/vscode,radshit/vscode,Microsoft/vscode,Krzysztof-Cieslak/vscode,the-ress/vscode,Zalastax/vscode,0xmohit/vscode,hoovercj/vscode,bsmr-x-script/vscode,veeramarni/vscode,eklavyamirani/vscode,veeramarni/vscode,radshit/vscode,matthewshirley/vscode,Zalastax/vscode,rishii7/vscode,microlv/vscode,stringham/vscode,mjbvz/vscode,Krzysztof-Cieslak/vscode,radshit/vscode,hoovercj/vscode,ups216/vscode,bsmr-x-script/vscode,microlv/vscode,mjbvz/vscode,williamcspace/vscode,ioklo/vscode,stringham/vscode,hoovercj/vscode,charlespierce/vscode,hungys/vscode,SofianHn/vscode,joaomoreno/vscode,edumunoz/vscode,KattMingMing/vscode,jchadwick/vscode,the-ress/vscode,Microsoft/vscode,radshit/vscode,hoovercj/vscode,cleidigh/vscode,DustinCampbell/vscode,joaomoreno/vscode,eklavyamirani/vscode,SofianHn/vscode,hungys/vscode,williamcspace/vscode,matthewshirley/vscode,stringham/vscode,sifue/vscode,rick111111/vscode,microsoft/vscode,0xmohit/vscode,rick111111/vscode,charlespierce/vscode,hungys/vscode,dersia/vscode,joaomoreno/vscode,edumunoz/vscode,charlespierce/vscode,KattMingMing/vscode,stringham/vscode,veeramarni/vscode,zyml/vscode,zyml/vscode,jchadwick/vscode,rishii7/vscode,DustinCampbell/vscode,eklavyamirani/vscode,matthewshirley/vscode,microsoft/vscode,landonepps/vscode,Krzysztof-Cieslak/vscode,alexandrudima/vscode,eamodio/vscode,eklavyamirani/vscode,mjbvz/vscode,cleidigh/vscode,KattMingMing/vscode