Don't allow missing snapshots without --snapshot-update#112

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davidshepherd7 wants to merge 3 commits intosyrusakbary:masterfrom davidshepherd7:dont-allow-missing-snapshots

+64-44

Commits on Sep 30, 2020

Don't allow missing snapshots without --snapshot-update
davidshepherd7
committed
Allow setting SNAPSHOT_UPDATE env variable to cause updates
davidshepherd7
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Commits on Oct 3, 2020

Hopefully fix black
davidshepherd7
committed