0.0.10

Add multilingual native embeddings class NativeContextualEmbeddings

• This new embeddings class uses the latest native embeddings from Apple called NLContextualEmbeddings #22. Prompted by discussion in issue #21 with @aehlke.
• Usage:

        let similarityIndex = await SimilarityIndex(
            model: NativeContextualEmbeddings()
            metric: CosineSimilarity()
        )

Full Changelog: 0.0.9...0.0.10