Add back ranges property

[hzoo]

We'll want to make this an option?

[codecov-io]

Codecov Report

❗ No coverage uploaded for pull request base (7.0@56a92cc). Click here to learn what that means.
The diff coverage is 92.85%.

@@          Coverage Diff           @@
##             7.0     #363   +/-   ##
======================================
  Coverage       ?   96.78%           
======================================
  Files          ?       20           
  Lines          ?     3449           
  Branches       ?      915           
======================================
  Hits           ?     3338           
  Misses         ?       58           
  Partials       ?       53

Impacted Files	Coverage Δ
src/options.js	100% <ø> (ø)
src/util/location.js	100% <100%> (ø)
src/plugins/flow.js	97.22% <100%> (ø)
src/parser/node.js	97.05% <90.9%> (ø)

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[danez]

Although it doesn't hurt to have it added all the time, but yes we could make it an option.

[hzoo]

Less options the better though, dono (it is an option in acorn though, so yea)