fix: incompatibility with newer transformers package (fixes #20)

[lrq3000]

Implements the fix proposed by @GOvEy1nw.

Also increases the minimum required version of transformers to ensure that we don't get the opposite issue (of people using older transformers version).

I considered supporting both the old and new transformers releases, but given the current transformers release is v4.46 and the minimum required version to fix this issue is v4.38, I think it's safe to support the newer releases only, as 4.38 is already quite old.

I did not edit the version, I let you do it.

[lrq3000]

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Thank you very much for your awesome work on this.