v1.0.0-alpha.7

Release 1.0.0-alpha.7

Summary

This incremental bi-weekly release includes an API change to relax the generic requirements on the wallet transaction builder and a small fix when manually looking ahead to unrevealed scripts. Unless you need one of these changes there's no need to upgrade to this release.

Changelog

Fixed

- Fix `KeychainTxOutIndex::lookahead_to_target` to look ahead to correct index.  #1349

Changed

- Relax the generic requirements on `TxBuilder`. #1312