Merge pull request qiniu#52 from qiniu/develop

Release v6.1.4

Merge pull request qiniu#50 from qiniu/develop

Release 6.1.3

Merge pull request qiniu#40 from qiniu/develop

Release v6.1.2

Merge pull request qiniu#25 from qiniu/develop

Update CHANGELOG.md

Merge pull request qiniu#22 from qiniu/develop

Release v6.1.0

Merge pull request qiniu#20 from qiniu/develop

Release v6.0.2

Merge pull request qiniu#10 from qiniu/develop

Release v6.0.1

Merge pull request qiniu#9 from qiniu/develop

Release v6.0.0