Missing `lodash` dependency declaration causes error in latest version of Gutenberg plugin

Recently Gutenberg finished removing all usage of `lodash`: https://github.com/WordPress/gutenberg/issues/17025#issuecomment-1632633444

Because the editor scripts in Authorship still rely on lodash, but it's not declared as a dependency, they fail in the latest version of the Gutenberg plugin:

```
Uncaught ReferenceError: lodash is not defined
```

It would be good to either rewrite code that depends on lodash or declare it as a dependency.