release: bump version to v0.9.4 and update changelog (coreos#2060)

Signed-off-by: Sam Batschelet <[email protected]>

Merge pull request coreos#2014 from hexfusion/release-v0.9.3

release: bump version to v0.9.3 and update changelog

Merge pull request coreos#1951 from hasbro17/haseeb/release-v0.9.2

release: bump version to v0.9.2 and update changelog

Merge pull request coreos#1938 from hasbro17/haseeb/bump-version-0.9.1

*: bump version to v0.9.1 and update changelog

release: bump version to 0.9.0 (coreos#1924)

same as 0.8.4. bump to 0.9.0 due to adding a new abs backup api

release: bump version to 0.8.4 (coreos#1923)

Merge pull request coreos#1883 from fanminshi/bump_version

release: bump version

Merge pull request coreos#1867 from hasbro17/haseeb/release-v0.8.2

release: 0.8.2

release: 0.8.1 (coreos#1850)

release: v0.8.0 (coreos#1824)