Various ERIS fixes

What happened here is that I was copying them in place from somewhere else, thought I had changed the year before copying them from one file to the other, but ended up not doing that :')

This MR also adds a better test suite to the ERIS crate. It now parses and decodes a set of example vectors. It also re-constructs the input data, encodes it and then compares the output to the stored values.