title: Redshift - unsupported type "serial" for auto increment id with node-orm-2
body: <p>Any insight on how to get an auto increment id working? From my understanding, an id column is added by default; however, because I'm using Redshift, the default "serial" type won't work as it is not supported.</p>
  
  <pre><code>{ [error: Column "probe.id" has unsupported type "serial".]
    name: 'error',
    length: 165,
    severity: 'ERROR',
    code: '0A000',
    detail: undefined,
    hint: undefined,
    position: undefined,
    internalPosition: undefined,
    internalQuery: undefined,
    where: undefined,
    schema: undefined,
    table: undefined,
    column: undefined,
    dataType: undefined,
    constraint: undefined,
    file: '/home/awsrsqa/padb/src/pg/src/backend/parser/parser_analyze.c',
    line: '3600',
    routine: 'transformColumnDefinition',
    model: 'probe' }
  </code></pre>