Release 2.4.2

Merge pull request palantir#520 from palantir/release-2.4.1

Release 2.4.1

Merge pull request palantir#508 from palantir/release-2.4

Release v2.4.0

v2.3.1-beta

Merge pull request palantir#429 from leeavital/2.3.0-release

Prepare for version 2.3.0