Feature: Schema
Scenario: Schema from Parquet
When the REPL is ran and the user types:
```
read("fixtures/table.parquet") |> schema()
```
Then the command should succeed
Scenario: Schema with select
When the REPL is ran and the user types:
```
read("fixtures/table.parquet") |> select(:one, :two) |> schema()
```
Then the command should succeed