[ci skip]
Merge pull request qiniu#132 from qiniu/develop Release 6.1.9
Merge pull request qiniu#126 from qiniu/develop Release 6.1.8
Merge pull request qiniu#123 from qiniu/develop Release 6.1.7
Merge pull request qiniu#118 from qiniu/develop Release 6.1.6
Merge pull request qiniu#105 from qiniu/develop Release 6.1.5
Merge remote-tracking branch 'origin/develop'
Merge pull request qiniu#77 from qiniu/develop Release v6.1.3
Update CHANGELOG.md