Ensure an error is thrown when attempting to import non-exported bindings.

For example Canary will throw an error like:
```
Uncaught SyntaxError: The requested module does not provide an export named 'd'
```

Safari errors with:
```
SyntaxError: Importing binding name 'd' is not found.
```

Firefox Nightly errors with:
```
SyntaxError: import 'd' not found
```

Edge (Experimental Flag)
```
Silent fail (No error message)
```