Wildcard dependencies restriction should not be applied to [dev-dependencies]

[lbeschastny]

It makes sense to disallow wildcard (*) dependencies:

the remote server responded with an error (status 400 Bad Request): wildcard (*) dependency constraints are not allowed on crates.io. Crate with this problem: aws-sdk-dynamodb See https://doc.rust-lang.org/cargo/faq.html#can-libraries-use--as-a-version-for-their-dependencies for more information

But I don't think this restriction should be applied to [dev-dependencies] since those are only used for building and testing the crate.

For example, I tried to publish a crate with something like this in the Cargo.toml manifest:

[dependencies]
aws-sdk-dynamodb = { version = "1.86.0", optional = true }

[dev-dependencies]
aws-sdk-dynamodb = "*"