bump the mapnik appveyor sdk to try to trigger #596
bump the mapnik appveyor sdk to try to trigger #596

langateam/node-mapnik,tomhughes/node-mapnik,CartoDB/node-mapnik,CartoDB/node-mapnik,tomhughes/node-mapnik,mapnik/node-mapnik,langateam/node-mapnik,tomhughes/node-mapnik,tomhughes/node-mapnik,mapnik/node-mapnik,langateam/node-mapnik,CartoDB/node-mapnik,CartoDB/node-mapnik,mapnik/node-mapnik,CartoDB/node-mapnik,tomhughes/node-mapnik,mapnik/node-mapnik,langateam/node-mapnik,langateam/node-mapnik,mapnik/node-mapnik