Document `yarn link` before running tests (#570)
Document `yarn link` before running tests (#570)


jantimon/html-webpack-plugin,ampedandwired/html-webpack-plugin,SimenB/html-webpack-plugin,SpaceK33z/html-webpack-plugin,jantimon/html-webpack-plugin,SimenB/html-webpack-plugin,SpaceK33z/html-webpack-plugin,ampedandwired/html-webpack-plugin