📝 Writing docs. add pig archetype

🐛 Fixing a bug. closed https://gitee.com/log4j/pig/issues/I1VZE0 pig-…

…sentinel-dashboard final name 设置错误

Merge remote-tracking branch 'origin/master'

# Conflicts:
#	README.md

Merge branch 'dev'

🔖 Releasing / Version tags. 2.8

🔖 Releasing / Version tags. 2.7.4

🔖 Releasing / Version tags. 2.7.2

🔖 Releasing / Version tags. 2.7.0

⬆️ Upgrading dependencies. spring boot 2.2.5

⬆️ Upgrading dependencies. spring cloud alibaba 2.2.0