Merge pull request qiniu#123 from qiniu/develop

6.2.5

Merge pull request qiniu#121 from qiniu/develop

Release 6.2.4

Merge pull request qiniu#119 from qiniu/develop

Release 6.2.3

Merge pull request qiniu#116 from qiniu/develop

Release v6.2.2 (patch2)

Update CHANGELOG.md

Merge pull request qiniu#112 from qiniu/develop

Release v6.2.2

Merge pull request qiniu#104 from qiniu/develop

Release v6.2.1 (patch)

Merge pull request qiniu#99 from qiniu/develop

rio bugfix

Merge pull request qiniu#93 from qiniu/develop

Release v6.1.2

Merge pull request qiniu#91 from qiniu/develop

Release v6.1.1