this.log is undefined.

[JohnMealy23]

I'm getting a broken thread from the following line:

• https://github.com/jonschlinkert/parse-csv/blob/fc492d63e6ae80539689b3a0d663ca78aea819a3/lib/parser.js#L144

  TypeError: this.log is not a function
    at Parser.parse (node_modules/parse-csv/lib/parser.js:144:12)
    at csv (node_modules/parse-csv/index.js:61:25)
    at Function.module.exports.toJSON (node_modules/parse-csv/index.js:94:25)
    at Object.lambda.parseCsv.data [as parseCsv] (src/index.js:223:41)
    at Context.it (tests/validator_index.js:254:38)
    at process.topLevelDomainCallback (domain.js:101:23)

  I'll submit a PR to add a temporary logger, but please feel free to ignore it and point me in the right direction, if there's a better way.