This library has the following policy about versions. - Presently, all planned versions have a major version number of 0. - The minor version number increases for every backward-incompatible change to a documented behavior. - The patch version number increases for every added feature, backward-incompatible changes to undocumented features, and bug-fixes. Upon the release of a version 1.0.0, the strategy will be revised. - The major version will increase for any backward-incompatible changes. - The minor version will increase for added features. - The patch version will increase for bug-fixes.