[webpack] TypeError: Cannot read property 'tap' of undefined

webpack과 html-webpack-plugin의 5버전 사용했을때 발생하는 문제

5버전대 패키지 삭제하고 4버전대로 내린다

npm uninstall html-webpack-plugin webpack webpack-cli
npm i -D html-webpack-plugin@4.4.0 webpack@4.40.2 webpack-cli@3.3.9