Release v2.2.0

What's Changed

• Update dependency version in example & update wechat group QR code by @dongxuny in #101
• Update wechat-group-cn.jpeg by @dongxuny in #102
• Add official site URL in README.md by @dongxuny in #103
• Add badges in README.md by @dongxuny in #105
• Updates based on [email protected] by @dongxuny in #107

Full Changelog: v2.1.2...v2.2.0