upgrade swoole to 4.4.1

Merge pull request swoft-cloud#788 from swoftcloud/master

Add composer

Merge pull request swoft-cloud#728 from swoftcloud/master

Add dmeo

Merge pull request swoft-cloud#665 from swoftcloud/master

Added rpc error handler

Modify composer

Update composer.json

Update README.md

增加rpc-client配置 (swoft-cloud#340)

Update composer.json

Upgrade db to v1.1

Merge branch 'master' of https://github.com/swoft-cloud/swoft