Switch from jsonLint to something more up to date

[titaniumbones]

jsonlint hasn't been modified in 2 years. possible replacements:

• json-lint
• [google search[(https://www.google.com/search?client=firefox-b-d&ei=utBqXb23Csba-gTMory4Cw&q=npm+json+linter&oq=npm+json+linter&gs_l=psy-ab.3..35i39j0j0i22i30l2.8266.8938..9108...0.3..0.227.859.2-4......0....1..gws-wiz.......0i71.jUrInOZBFR0&ved=0ahUKEwi9_LL78a3kAhVGrZ4KHUwRD7cQ4dUDCAo&uact=5)