v0.3.1 - DASer parallelisation and quick fix to cel-key

This patch release notably includes an optimisation to the DASer in order to provide faster sampling over past headers and a fix to the cel-key utility to read from the correct node directory (which was broken in v0.3.0).

What's Changed

FEATURES

IMPROVEMENTS

BUG FIXES

DEPENDENCIES

MISC

New Contributors

Full Changelog: https://github.com/celestiaorg/celestia-node/compare/v0.3.0...v0.3.1