requires.io is cool. It automatically creates a PR if your dependencies are outdated. Travis then verifies them:
miniblog.
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`npm outdated` is a useful command that colour-codes output based on semantic versioning compatibility.
I wonder if time information would help too? If I'm on 1.0.1 and 1.0.5 is the latest, but 1.0.1 came out in 2010, that's useful knowledge.
Found some outdated elisp on stackoverflow and fixed it, but saw it had been copy-pasted on assorted repos. Code has a half-life sometimes.