Bump version to 2.13.1 (#1661)

Fix version ranges for rouge and nokogiri in 2.13.0 release

Bump version to 2.12.0 (#1524)

cut 2.11.0 release (#1455)

cut 2.10.0 release (#1428)

Signed-off-by: Matthew Peveler <[email protected]>

cut 2.9.2 release

Signed-off-by: Matthew Peveler <[email protected]>

cut 2.9.1 release (#1400)

Signed-off-by: Matthew Peveler <[email protected]>

Fix changelog entry for 2.9.0

cut 2.8.0 release

Signed-off-by: Matthew Peveler <[email protected]>

cut 2.7.1 release

Signed-off-by: Matthew Peveler <[email protected]>