loongson/pypi: links for webpack

loongson/mirror webpack-6.0.0.tar.gz
loongson/mirror webpack-5.0.2.tar.gz
loongson/mirror webpack-5.0.1.tar.gz
loongson/mirror webpack-5.0.0.tar.gz
loongson/mirror webpack-4.1.1.tar.gz
loongson/mirror webpack-4.1.0.tar.gz
loongson/mirror webpack-4.0.1.tar.gz
loongson/mirror webpack-4.0.0.tar.gz