Why are all gems now built in 1980?

Bundler v2.7.0 had a change that went largely unnoticed: reproducible builds. See https://reproducible-builds.org/

Previously biulds were only reproducible if you set SOURCE_DATE_EPOCH in the env.

Gems that relied on reproducible builds, like stone_checksums, wouldn't work without it and enforced it.

But in bundler v2.7+ SOURCE_DATE_EPOCH is not required, so I've released stone_checksums v1.0.2, with support for both types.

And now all ruby gems are built in the same second in 1980.

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