v2.2.5

增加：add meta data indexing api
删除：remove github.com/baiyubin/aliyun-sts-go-sdk/sts deps.
修改：remove chartset info in text/* mime type.
增加：add restore info in listObjects/listObjectVersions
增加：add x-oss-ac-* into subresource list.
修改：fix select object bug.
增加：getBucketStat api returns more info
增加：support X-Oss-Notification header in CompleteMultipartUpload api.