doc.infobox().json() response contains incomplete/inconsistent property values

[malcolmcameron]

Example:
url: https://en.wikipedia.org/wiki/LVMH
traded as within infobox on page:

wtf_wikipedia response:
wtf.fetch("LVMH").then((doc) => {
  console.log(doc.infobox().json());
})

the response is missing some data (Euronext Paris: MC).

Noticed this in several other infobox responses.

[spencermountain]

merging this one with #391