docs(node): change to at least node `8.9.4` (#138)
docs(node): change to at least node `8.9.4` (#138)

For the rerun only affected tests on saving a test or src file the node
runner needs at least node version `8.9.4` else we will not be able to
find the corresponding module in the `require` cache
qlik-oss/after-work.js