Revert Windows/Appveyor CI to libvips 8.0.2
Revert Windows/Appveyor CI to libvips 8.0.2

chrisriley/sharp,brandonaaron/sharp,lovell/sharp,digital-flowers/sharp-win32,papandreou/sharp,pporada-gl/sharp,digital-flowers/sharp-win32,brandonaaron/sharp,mhirsch/sharp,papandreou/sharp,mdimitrov/sharp,pporada-gl/sharp,mhirsch/sharp,cmtt/sharp,chrisriley/sharp,mdimitrov/sharp,digital-flowers/sharp-win32,digital-flowers/sharp-win32,lovell/sharp,mhirsch/sharp,digital-flowers/sharp-win32,digital-flowers/sharp-win32,lovell/sharp,lovell/sharp,digital-flowers/sharp-win32,brandonaaron/sharp,papandreou/sharp,cmtt/sharp,brandonaaron/sharp,chrisriley/sharp,mdimitrov/sharp,cmtt/sharp,papandreou/sharp,pporada-gl/sharp,lovell/sharp,lovell/sharp,mhirsch/sharp,mdimitrov/sharp,papandreou/sharp,chrisriley/sharp,cmtt/sharp,chrisriley/sharp,pporada-gl/sharp,pporada-gl/sharp,mdimitrov/sharp,brandonaaron/sharp