fix: update dependencies

feat: add previous subroutine

test: document a failing css-select case

fb55/css-select#111

feat: disable XML mode

See https://github.com/cheeriojs/cheerio/issues/1211

fix: update error message

fix: temporarily disable linting of /test directory

Refer to: avajs/eslint-plugin-ava#179

fix: include src/ in npm

fix: flow

fix: drop node < 8 support

fix: correct automatic index resolution logic