chore(deps): bump acorn in /examples/extend-webpack-config

chore(deps): bump acorn from 6.1.1 to 6.4.1 in /docs

chore(deps): bump acorn from 5.7.3 to 5.7.4

chore(deps): bump handlebars from 4.1.2 to 4.5.3

chore(deps): bump mixin-deep in /examples/extend-webpack-config

chore(deps): bump mixin-deep from 1.3.1 to 1.3.2 in /docs