Fix missing npm dependencies

Some older dependencies have gone missing on npm

when including `"broccoli-ruby-sass": "^0.2.0"` in another repo:

```
npm ERR! Error: version not found: broccoli-static-compiler@0.1.2
```

`0.1.3` doesn't appear to be in npm either, so i upgraded to `0.1.4`

When trying to build this repo, another dependency appeared to be missing from npm too:
```
npm ERR! Error: version not found: broccoli-kitchen-sink-helpers@0.1.0
```

Thus I updated `broccoli` dep to `^0.7.2`