3.1.2.1

Please follow Maven for the latest release

Note: We use a 4 point versioning system: (Semantic Versioning 2.0.0 + 1) W.X.Y.Z
W: The Upstream API version that is being targeted - simpler to ensure the correct client API
X: MAJOR version when we make incompatible API changes
Y: MINOR version when we add functionality in a backward compatible manner
Z: PATCH version when we make backward compatible bug fixes