Support the missing Athena types

The types are described in this page: .

Here are the types:

- [x] `boolean`
- [x] `tinyint`
- [x] `smallint`
- [x] `int`
- [x] `integer`
- [x] `bigint`
- [x] `double`
- [x] `float`
- [x] `decimal`
- [x] `char`
- [x] `string`
- [x] `array`
- [x] `struct`
- [ ] `varchar`
- [ ] `binary`
- [ ] `date`
- [ ] `timestamp`
- [ ] `map` (this might require a change to the `Athena` type so that primitive types are separated from the recursive ones)