Strata v2.0.0-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.