It makes enable to use the string interpolation with IN statement and ORDER BY statement

I want to use the string interpolation with IN statement and ORDER BY statement.

for example

```scala
case class User(id: Int, name: String)

val ids = Seq(1, 2, 4)
val sorting = SqlLiteral("DESC")
val users = sql"select * from users where id in (${ids}) order by id ${sorting}".map {
  rs => User(id = rs.int("id"), name = rs.string("name"))
}.list.apply()
users.size should equal(2)
users.map(_.name) should equal(Seq("bar", "foo"))
```