chore: bump version and correct license (halo-dev#15)

perf: Use async client and multipart upload to avoid out of memory by @longjuan in halo-dev#7
feat: add access style options to support minio binding domain names by @longjuan in halo-dev#13
feat: check the file already exists before uploading by @longjuan in halo-dev#11
```release-note
None
```

fix: EndpointProtocol setting item does not take effect (halo-dev#10)

Fixes halo-dev#9
```release-note
fix endpointProtocol setting item does not take effect
```

Bump version to 1.2.0 (halo-dev#3)

```release-note
None
```