frontend 3.4.1 backend 3.5.1

Merge pull request #124 from LucienShui/dev

frontend version 3.4.0, backend version 3.5.0

Merge pull request #123 from LucienShui/dev

backend 3.4.0, frontend 3.3.0

GoBackend 3.2.2

Change master to main in release-drafter

Merge pull request #119 from LucienShui/chore/update_version

Add donate link, update version

Merge pull request #82 from LucienShui/dev

Sync submodule at 2019-11-24 11:38:52

Merge pull request #83 from LucienShui/dev

Add docker branch support in actions, remove .travis.yml

Merge pull request #68 from LucienShui/dev

3.0.3F-3.0.1B, update README.md, update screenshots

Merge pull request #63 from LucienShui/dev

Update CHANGELOG.md