Release Strata version 2.0.0-alpha.70.

 * Restore `vivify` in `delete.t.js`.
 * Audit TODOs.
 * Add `_balanceIf` to merge logic.
 * O_SYNC and writev faster than fsync.
 * Replace latch with a Future class.
 * Use Node.js 12 compatible call to `handle.read()`.
 * Remove reference to deleted dependency.
 * Upgrade `writeahead` to `0.0.5`.
 * Upgrade `interrupt` to `11.0.0-alpha.16`.
 * Upgrade `fracture` to `0.3.0-alpha.25`.
 * Upgrade `whittle` to `0.0.1`.
 * Upgrade `reciprocate` to `0.0.5`.
 * Upgrade `destructible` to `7.0.0-alpha.30`.
 * Upgrade `rescue` to `7.0.0-alpha.9`.
 * Upgrade `journalist` to `0.1.19`.
 * Upgrade `turnstile` to `6.0.0-alpha.43`.
 * Upgrade `magazine` to `6.0.0-alpha.5`.
 * Upgrade `transcript` to `0.1.4`.
 * Update `LICENSE` copyright range.
 * Update `LICENSE` for 2021.
 * Remove Staccato dependency.
 * Remove Prospective dependency.
 * Upgrade `journalist` to `0.1.18`.
 * Implement write-ahead only storage.
 * Fix Journalist upgrade.
 * Upgrade `journalist` to `0.1.15`.
 * Upgrade `fracture` to `0.3.0-alpha.23`.
 * New Journalist, handle cache.
 * Upgrade `journalist` to `0.1.15`.
 * Upgrade `journalist` to `0.1.14`.
 * Remove debugging messages.
 * Upgrade `magazine` to `6.0.0-alpha.2`.
 * Update for Destructible, Journalist.
 * Upgrade `fracture` to `0.3.0-alpha.22`.
 * Upgrade `destructible` to `7.0.0-alpha.27`.
 * Upgrade `turnstile` to `6.0.0-alpha.42`.
 * Upgrade `journalist` to `0.1.13`.

Closes #739.

package.json

@@ -1,6 +1,6 @@
 {
     "name":                 "b-tree",
-    "version":              "2.0.0-alpha.69",
+    "version":              "2.0.0-alpha.70",
     "description":
 
       "Async/Await I/O B-tree in pure JavaScript for Node.js.",