Bootstrap

Problem:
```
  * Problem:
  *   inferred conversion: scaladyno.playground.macroz.`package`.convert[Nothing]
  *   desired conversion: scaladyno.playground.macroz.`package`.convert[?{<method> def bar: ?}]
  */
  c.bar() // in components/scratchpad/src/scaladyno/playground/scratchpad/Scratchpad.scala:42
```

Ping @xeno-by: do you know if we can propagate the pt to the macro's type parameter?