browser field in package.json no longer works

In package.json I have

``` JSON
"browser": {
"rampage": "./rampage/static-dev/js/rampage.js"
}
```

In browserify <10.1.1 I could then use .add('rampage') just fine, now however it errors out:

```
Error: Cannot find module '*snip*/rampage' from '*snip*'
at *snip*/node_modules/browserify/node_modules/resolve/lib/async.js:55:21
at load (*snip*/node_modules/browserify/node_modules/resolve/lib/async.js:69:43)
at onex (*snip*/node_modules/browserify/node_modules/resolve/lib/async.js:92:31)
at *snip*/node_modules/browserify/node_modules/resolve/lib/async.js:22:47
```

I can't test 10.1.1 to be certain because of the JSONStream changes, I can't even roll back to a working browserify version because of that as well. This was most definitely working in 10.1.0 though.