up version to 0.22.2

Signed-off-by: Yan Zhang <[email protected]>

up version to 0.22.1 (microsoft#943)

Signed-off-by: Yan Zhang <[email protected]>

up version to 0.22.0 (microsoft#926)

Signed-off-by: Yan Zhang <[email protected]>

up version to 0.21.0 (microsoft#898)

Signed-off-by: Yan Zhang <[email protected]>

up version to 0.20.0 (microsoft#854)

Signed-off-by: Yan Zhang <[email protected]>

up version to 0.19.0 (microsoft#842)

Signed-off-by: Yan Zhang <[email protected]>

Update CHANGELOG.md

upversion to 0.18.6 (microsoft#770)

Signed-off-by: Yan Zhang <[email protected]>

upversion to 0.18.5 (microsoft#754)

Signed-off-by: Yan Zhang <[email protected]>

upversion to 0.18.4 (microsoft#730)

Signed-off-by: Yan Zhang <[email protected]>