Add support for ESLint to find errors quicker

[mtscout6]

For example you are exposing yourself to problems by using the same variable name err within a nested closure.

• https://github.com/KanoYugoro/NodeCLI/blob/master/bin/versionIO.js#L10
• https://github.com/KanoYugoro/NodeCLI/blob/master/bin/versionIO.js#L16