At the moment it is hard to determine what our "next" version of infusion will be. We just tagged Infusion 2.0. Will the next version be 2.0.1, 2.1, or 3.0. In the past we've updated the version number in the repo to reflect the next version. This also has implications for how our dev releases are versioned, via the fluid-publish module; which currently takes the version from the package.json file and appends -dev.xxxxxxxxxxxxx ( where xxxxxxxxxx refers to the date and commit hash that it was built from ).
See thread for discussion and proposals: http://fluid.2324889.n4.nabble.com/Infusion-dev-numbering-proposal-tt9838.html