Use es-like lodash names

[GoodForOneFare]

Lodash's docs show that the following _ methods can be safely renamed to their non-aliased versions.

Old name	Standard name
_.first	_.head
_.each	_.forEach
_.eachRight	_.forEachRight
_.entries	_.toPairs
_.entriesIn	_.toPairsIn
_.extend	_.assignIn
_.extendWith	_.assignInWith