loongson/pypi: links for wagtail-publish-preflight

loongson/mirror wagtail-publish-preflight-0.4.tar.gz
loongson/mirror wagtail-publish-preflight-0.3.tar.gz
loongson/mirror wagtail-publish-preflight-0.2.tar.gz
loongson/mirror wagtail-publish-preflight-0.1.tar.gz