explicitly add license type to Cargo.toml

[BatmanAoD]

Crates.io apparently considers this crate to have a "nonstandard" license, even though the License text is Apache-2.0. I expect this should fix that.

[BatmanAoD]

I think this fixes the issue.

cargo license output on the main branch:

Custom License File (1): rigetti-pyo3

On this branch:

apache-2.0 (1): rigetti-pyo3

[Shadow53]

LGTM. Only potential issue I see is some future linting getting upset that we specify both license and license-file.

[tomelliff]

LGTM. Only potential issue I see is some future linting getting upset that we specify both license and license-file.

The Cargo book says that the license-file option is only meant for non standard licenses.

If a package is using a nonstandard license, then the license-file field may be specified in lieu of the license field.

So I think we can just drop the license-file because we don't have a non standard license.