fixup express example for dumb people like me that run node versions that are not ancient
fixup express example for dumb people like me that run node versions that are not ancient

mapnik/node-mapnik,tomhughes/node-mapnik,stefanklug/node-mapnik,tomhughes/node-mapnik,stefanklug/node-mapnik,MaxSem/node-mapnik,tomhughes/node-mapnik,langateam/node-mapnik,gravitystorm/node-mapnik,MaxSem/node-mapnik,mapnik/node-mapnik,gravitystorm/node-mapnik,langateam/node-mapnik,Uli1/node-mapnik,langateam/node-mapnik,CartoDB/node-mapnik,Uli1/node-mapnik,mapnik/node-mapnik,mojodna/node-mapnik,gravitystorm/node-mapnik,Uli1/node-mapnik,langateam/node-mapnik,mojodna/node-mapnik,tomhughes/node-mapnik,gravitystorm/node-mapnik,stefanklug/node-mapnik,Uli1/node-mapnik,stefanklug/node-mapnik,MaxSem/node-mapnik,tomhughes/node-mapnik,CartoDB/node-mapnik,CartoDB/node-mapnik,CartoDB/node-mapnik,langateam/node-mapnik,mapnik/node-mapnik,mojodna/node-mapnik,mapnik/node-mapnik,mojodna/node-mapnik,CartoDB/node-mapnik,MaxSem/node-mapnik