modified travis environment
modified travis environment

wellflat/hello-collection,wellflat/hello-collection,wellflat/hello-collection,wellflat/hello-collection,wellflat/hello-collection,wellflat/hello-collection,wellflat/hello-collection,wellflat/hello-collection,wellflat/hello-collection,wellflat/hello-collection,wellflat/hello-collection,wellflat/hello-collection,wellflat/hello-collection