bump version

[conorbros]

No description provided.

[rukai]

Thanks for opening this.
The release will need to be 0.4.0 since it includes breaking changes to shotover's rust API.
Also, before the release I would like to finish off #1507
The only remaining parts now are CassandraSinkCluster and improving our backpressure.

[codspeed-hq]

CodSpeed Performance Report

Merging #1549 will not alter performance

_{Comparing conorbros:v0.3.2 (d6703df) with main (4c0bf18)}

Summary

✅ 37 untouched benchmarks