Buffer.from wasn't added to Node until v5.10.0, so the changes in 5888ca7 caused this to break when running Node 4. I'm thinking the engines in package.json needs to be updated to reflect this?
Buffer.from was backported to v4.5.0, so it would be nice if that was the minimum version required.
@mmcbride1007 @squarejaw future testing was added in 6.6.2 – should work on 4.x now.
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Buffer.fromwas backported to v4.5.0, so it would be nice if that was the minimum version required.