getImportableSymbolReferencesForDocument returning symbols from a different library
Hey guys,

I'm having an issue with Sketch 50's library API. Specifically, the `getImportableSymbolReferencesForDocument` function seems to be returning the incorrect symbols — or, it seems to be referencing a totally different library altogether:

```
var libraries = Library.getLibraries();
var library = libraries.find((library) => library.name === libraryName); // libraryName = "bui-web" in my case
var refs = library.getImportableSymbolReferencesForDocument(context.actionContext.document);
refs.find((symbol) => log(symbol.library.name)) // symbol.library.name = "bui-android", expected "bui-web". All symbols are from the wrong library.
```

Even when I explicitly point at the library that I want the symbols for, it gives me the wrong symbols:

```
var library = Library.getLibraryForDocumentAtPath('~/Library/Application Support/com.bohemiancoding.sketch3/Plugins/biq.sketchplugin/Contents/Resources/libraries/bui-web.sketch');
var refs = library.getImportableSymbolReferencesForDocument(context.actionContext.document);
refs.find((symbol) => log(symbol.library.name)) // all symbols are from 'bui-android' library, despite explicitly importing bui-web.
```

Any help with this issue would be greatly appreciated.