Update lodash dependency and modernize usage.

[tapvt]

Summary

I needed to get this to work with a more current lodash version, so that it would be compatible with Sails v0.12.

My editor auto-stripped the trailing whitespace. Sorry about the added diff noise.

Please review and merge these changes so that others can benefit.

Changes

• Updated lodash dependency to 4.17.4
• Replaced _.pluck() with _.map() as per Lodash 4.0.0 changelog
• Updated calls to _.template() as per Lodash 4.0.0 changelog