Bump version.json to 0.5.16

[ianconsolata]

No description provided.

[github-actions]

Suggested version: v0.5.16

Comparing to: v0.5.15 (diff)

Changes in go.mod file(s):

(empty)

gorelease says:

# diagnostics
required module github.com/microcosm-cc/[email protected] retracted by module author: Retract older versions as only latest is to be depended upon

# summary
Suggested version: v0.5.16

gocompat says:

Your branch is up to date with 'origin/main'.

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A draft GitHub Release has been created.
It is going to be published when this PR is merged.
You can modify its' body to include any release notes you wish to include with the release.