fix(abg): use the release date of the latest version for lastUpdated

[Vampire]

This makes the metadata file content more stable and allows to provide a checksum,
as Kotlin for example is quite unhappy if it finds no checksum or cannot successfully verify it.

Without this every request would produce a different file and thus also a different checksum file,
so the checksum would never match the file contents.

[Vampire]

• fix(abg): provide checksum for maven metadata #1613
• fix(abg): use the release date of the latest version for lastUpdated #1612 👈
• main

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[krzema12]

Can you show me how to reproduce Kotlin being unhappy by the lack of the checksum/release date? I experienced it for version-specific artifacts, but for this artifact I didn't.

[Vampire]

If you use a version range, it downloads the metadata file to get the list of versions and wants to validate it, then cries if it cannot.

[krzema12]

Merge activity

• Sep 9, 1:14 AM EDT: @krzema12 started a stack merge that includes this pull request via Graphite.
• Sep 9, 1:14 AM EDT: @krzema12 merged this pull request with Graphite.