Use 3.7-dev version for travis
Use 3.7-dev version for travis

scrapy/scrapy,elacuesta/scrapy,Ryezhang/scrapy,pawelmhm/scrapy,Ryezhang/scrapy,pablohoffman/scrapy,dangra/scrapy,elacuesta/scrapy,eLRuLL/scrapy,ArturGaspar/scrapy,wujuguang/scrapy,elacuesta/scrapy,starrify/scrapy,ArturGaspar/scrapy,pablohoffman/scrapy,wujuguang/scrapy,finfish/scrapy,kmike/scrapy,kmike/scrapy,kmike/scrapy,wujuguang/scrapy,finfish/scrapy,starrify/scrapy,eLRuLL/scrapy,dangra/scrapy,dangra/scrapy,pablohoffman/scrapy,Ryezhang/scrapy,scrapy/scrapy,scrapy/scrapy,eLRuLL/scrapy,pawelmhm/scrapy,starrify/scrapy,finfish/scrapy,pawelmhm/scrapy,ArturGaspar/scrapy