chore(release): Bump version to 0.4.2-SNAPSHOT

[arcaputo3]

Summary

• Bump build.mill fallback version to 0.4.2-SNAPSHOT
• Bump package.json version to 0.4.2-SNAPSHOT

Post-release snapshot bump after v0.4.1 tag.

🤖 Generated with Claude Code

[claude]

PR Review: chore(release): Bump version to 0.4.2-SNAPSHOT

This is a straightforward post-release snapshot bump. The changes are minimal and correct.

Code Quality / Correctness

• build.mill: The fallback version string correctly reflects the next development snapshot (0.4.2-SNAPSHOT). Using Task.Input ensures the env var is re-evaluated each run (not cached), which is the right approach for CI-driven version injection.
• package.json: Version bump aligns with the Scala/Mill version. Good to keep these in sync.

Minor Observations

1. Snapshot suffix convention: 0.4.2-SNAPSHOT is standard Maven/SBT convention. Since this is a Mill + Scala.js project publishing to npm as well, it's worth confirming that downstream npm consumers are OK with a -SNAPSHOT suffix — npm semver treats this as a pre-release identifier (it is valid, but tools parsing semver may sort it unexpectedly relative to 0.4.1). If npm publishing is ever automated, you may want 0.4.2-SNAPSHOT.0 or a consistent pre-release scheme.

2. No version file drift: There doesn't appear to be any other place (e.g., a VERSION file, docs, or README badge) that needs updating — looks clean.

Summary

No bugs, no security concerns, no test coverage gaps (this is a pure version bump). The PR does exactly what it says. Ready to merge once CI passes.

Generated with Claude Code