“I Will Follow” may be one of U2’s early hits, but that wasn’t exactly the sentiment Bono (whose real name is Paul Hewson) wanted his 21-year-old son to embrace. But Inhaler, the rock outfit that Hewson fronts, has big buzz on the heels of new single “When It Breaks,” with Spin magazine calling them “one of the 2020 bands you need to know” even before the group has released its debut album.