use of undeclared crate or module futures with polars 0.43.0

[ankane]

Checks

• I have checked that this issue has not already been reported.
• I have confirmed this bug exists on the latest version of Polars.

Reproducible example

Enable the following features in Cargo.toml:

[dependencies]
polars = { version = "0.43.0", features = ["lazy", "parquet", "streaming"] }

And try to compile any program.

Log output

Compiling polars-pipe v0.43.0
error[E0432]: unresolved import `futures`
 --> /Users/user/.cargo/registry/src/index.crates.io-6f17d22bba15001f/polars-pipe-0.43.0/src/executors/sources/parquet.rs:7:5
  |
7 | use futures::{StreamExt, TryStreamExt};
  |     ^^^^^^^ use of undeclared crate or module `futures`

For more information about this error, try `rustc --explain E0432`.

Issue description

It looks like the futures feature needs to be enabled with this combination of features.

Expected behavior

No error

Installed versions

See above