...to quieten this sort of thing when installing a module with a dependency on stackup:

```sh
npm WARN package.json stackup@0.0.5 No repository field.
```

Adds repository entry to package.json

npm doesn't always install async-listener as a nested dependency of
this module, so look it up using the same algorithm as require() to
ensure the stack frames are correctly filtered.

Dynamically figure out async-listener location from require.resolve