update .goreleaser.yml

(cherry picked from commit eb8a65c)

add maintainer
(cherry picked from commit a5947ec)

ci(chore): Fix stylings

Merge pull request Mrs4s#802 from finpluto/master

chore(dep): Upgrade go from 1.15.5 to 1.16 in dockerfile.

fix: update url

feat: self private message.

Merge pull request Mrs4s#697 from povsister/ldflags-typo

Fix a comment typo

feat enable_self_message config.

fix atall permission error.

feat self group message event.

update doc.