Aside from being up-to-date, this may improve build time/size.
@ -31,8 +31,8 @@
"typogr": "^0.6.6",
"uglify-js": "^2.6.1",
"vinyl-fs": "^2.4.4",
"webpack": "^2.2.1",
"webpack-stream": "^3.2.0",
"webpack": "^3.5.5",
"webpack-stream": "^4.0.0",
"wintersmith": "^2.0.0",
"yargs": "^3.14.0"
},