knex: If it's NULL, let it be NULL

I have NULL data in DATE column. But when fetching using bookshelf (using knex), it’s return Thu Jan 01 1970 07:00:00 GMT+0700 (SE Asia Standard Time) equal to new Date(null) or new Date(0).

After checking knex@0.10.0, I found parseType function:

// file: .\knex\lib\dialects\maria\index.js
// line: 117
function parseType(value, type) {
  switch (type) {
    case 'DATETIME':
    case 'TIMESTAMP':
      return new Date(value);
    case 'INTEGER':
      return parseInt(value, 10);
    default:
      return value;
  }
}

In regards to NULLABLE column type. IMHO, it’s should respect the NULL data.

But with parseType function above, if the data is NULL will produce:

• start of javascript Date Object for DATETIME and TIMESTAMP
• and NaN for Integer