Ignore additional result properties
Ignore additional result properties

The result has some additional properties:
 "extract": "id HTML :(</p>\n</bod"
 "firstColumn": 53
 "hiliteLength": 4
 "hiliteStart": 10
Not sure whether to check for these as well, I left things at the old set of
properties, but reformulated the test to allow for extra keys in addition to
the named ones.

hiroaki-yamamoto/node-validator-nu