Wrote a small helper to compare tochrono-english.
Apart from#23 and#83, I found some other small issues:

• year ago produces a one-day offset, presumably because of leap years not being accounted for
• today, while being consistent in both tools, I would expect to refer to the day start rather than the current time
• -1h1m should be 61 minutes ago, the preceding minus shall negate the whole expression. It should understand-1h +1m for 59 minutes ago.