A NEW DECADE IS BEFORE US. What we’ve learned from the dawn of decades is that predictions often don’t pan out. We know some definite developments that will happen in 2020. Perhaps the best course of action is to take the ’20s decade one year at a time. Here is what we know will happen in the next 12 months. • Summer Olympics in Tokyo. Japan will put on a grand show in 34 venues from July 23 to…