v0.6.1
Our UMD build (redux-starter-kit.umd.js) has actually been broken for a while, because it still tried to reference process, which doesn't exist in a web environment.
We've updated our build process to ensure that the UMD build is fixed up to correctly handle that "is dev" check.
In addition, we only had an unminified UMD dev build so far. We now include a properly minified production-mode UMD build as well, redux-starter-kit.umd.min.js.
Note that our configureStore() function defaults to different behavior in dev and prod by including extra runtime check middleware in development. The dev and prod UMD builds should match the dev/prod behavior for configureStore(), so if you are using a UMD build and want the runtime checks, make sure you link to the dev build.
Finally, note that when used as a plain script tag, the UMD builds now create a global variable named window.RSK, rather than window["redux-starter-kit"]. This is theoretically a breaking change, but given that the UMD builds have never worked right, I'm fine with calling this a "patch" instead :)