Pin transformers to a version before 4.48

GitOrigin-RevId: c5b9fe6b5650e2303360fa7d898e485744392a2a

enforce max context_length_estimate <= max n_positions

GitOrigin-RevId: 3e9481845f4cb4ac6b0e6af94383e48bb56e4722

v0.5.0 release

Merge pull request #6 from aws-neuron/1.3

Add v0.4.0 release content

change version to 0.3.0

Create releasenotes.md