Option[Long] is generated as "object", should be "integer"

[wajda]

Failing unit test:
class DocGeneratorSpec:

  it should "generate Option[Long] correctly" in {
    swaggerJson should include(""""long":{"type":"integer","format":"int64"}""")
    swaggerJson should include(""""maybeLong":{"type":"integer","format":"int64"}""")
  }
...
  case class Foo(
    long: Long,
    maybeLong: Option[Long],
    maybeBar: Option[Seq[Bar]],
    seqOfBars: Seq[Seq[Bar]]
  )