* Add a MerkleProof.processProof utility function * Add changelog entry * fix lint * return index when processingProof * fix lint * fix test * Apply suggestions from code review Co-authored-by: Francisco Giordano <frangio.1@gmail.com> * improve documentation * Apply suggestions from code review Co-authored-by: Francisco Giordano <frangio.1@gmail.com> * remove index - see discussion in the PR * update changelog Co-authored-by: Francisco Giordano <frangio.1@gmail.com>