Release Amalgamate version 0.1.39.
Release Amalgamate version 0.1.39.

 * Remove old recovery.
 * Now able to reopen an amalgamator.
 * Refactor conflict detection, document logic.
 * Shift amalgamated write-ahead logs.
 * Rotate and shutdown.
 * Skip call to flush and it is now performant.
 * Shutting down correctly.
 * Filter stages by snapshot on read.
 * Each stage had only one group.
 * Adapt for use of a write-ahead log.
 * Upgrade `dilute` to `2.0.0-alpha.7`.
 * Upgrade `skip` to `0.2.14`.
 * Upgrade `interrupt` to `11.0.0-alpha.16`.
 * Upgrade `b-tree` to `2.0.0-alpha.72`.
 * Upgrade `homogenize` to `2.0.0-alpha.15`.
 * Upgrade `designate` to `2.0.0-alpha.15`.
 * Upgrade `splice` to `3.0.0-alpha.33`.
 * Upgrade `twiddle` to `2.0.0-alpha.8`.
 * Upgrade `whittle` to `0.0.1`.
 * Upgrade `reciprocate` to `0.0.5`.
 * Upgrade `ascension` to `3.0.0-alpha.2`.
 * Upgrade `destructible` to `7.0.0-alpha.30`.
 * Upgrade `rescue` to `7.0.0-alpha.9`.
 * Upgrade `turnstile` to `6.0.0-alpha.43`.
 * Upgrade `magazine` to `6.0.0-alpha.5`.
 * Upgrade `riffle` to `2.0.0-alpha.47`.
 * Update `LICENSE` for 2021.
 * Build with Node.js 12, 14 and 15 on CI/CD.
 * Replace Prospective with Eject.
 * Upgrade `b-tree` to `2.0.0-alpha.69`.
 * Upgrade `skip` to `0.2.12`.
 * Upgrade `homogenize` to `2.0.0-alpha.14`.
 * Upgrade `designate` to `2.0.0-alpha.14`.
 * Upgrade `splice` to `3.0.0-alpha.32`.
 * Upgrade `ascension` to `3.0.0-alpha.1`.
 * Upgrade `riffle` to `2.0.0-alpha.46`.
 * Upgrade `interrupt` to `11.0.0-alpha.14`.
 * Upgrade `destructible` to `7.0.0-alpha.26`.
 * Upgrade `rescue` to `7.0.0-alpha.8`.
 * Upgrade `reciprocate` to `0.0.3`.

Closes #208.

bigeasy/amalgamate,bigeasy/amalgamate