ij.py.run_script returns the wrong type

`ij.py.run_script` [promises](https://github.com/imagej/pyimagej/blob/4ea599e992e2a428a00122c6d6af979b87b67fc1/src/imagej/__init__.py#L331) to return a java map, but it returns a [`ScriptModule`](https://github.com/imagej/pyimagej/blob/4ea599e992e2a428a00122c6d6af979b87b67fc1/src/imagej/__init__.py#L365) instead. Should be a simple change to simply call `getOutputs` on the return of `.get()`.