Transformer-embeddings

Fix
* Updating transformers version to resolve critical dependabot security alerts ([39](https://github.com/HeadspaceMeditation/transformer-embeddings/issues/39)) ([`4a952ac`](https://github.com/HeadspaceMeditation/transformer-embeddings/commit/4a952acf64bb91e03fd4ee73b0fc5cfa2c032e1d))

Fix
* Fix ModelOutput subclass by adding dataclass decorator ([32](https://github.com/HeadspaceMeditation/transformer-embeddings/issues/32)) ([`5cfd22c`](https://github.com/HeadspaceMeditation/transformer-embeddings/commit/5cfd22ce50196ec8a4e9436f40dc6a20960fe4d1))