Cargo.toml instructions should suggest bio = "1" instead of bio = "*"

[ChaiTRex]

On the home page of Rust-Bio's documentation, it says

To use Rust-Bio in your Rust project, add the following to your Cargo.toml

[dependencies]
bio = "*"

Crates like Rust-Bio should follow Rust conventions like semantic versioning, which says:

Given a version number MAJOR.MINOR.PATCH, increment the:

1. MAJOR version when you make incompatible API changes
2. MINOR version when you add functionality in a backward compatible manner
3. PATCH version when you make backward compatible bug fixes

Additional labels for pre-release and build metadata are available as extensions to the MAJOR.MINOR.PATCH format.

cargo uses that convention when figuring out which version of Rust-Bio to download. So, Cargo.toml should instead include, at the least:

[dependencies]
bio = "1"

To explain why, let's say that someone makes a nice library crate that depends on Rust-Bio. With bio = "*", that nice library crate will stop compiling successfully if a beneficial improvement to Rust-Bio ever requires making backwards-incompatible changes. The users of that nice library crate will not really be able to fix that themselves since they don't control that nice library crate. With bio = "1", the nice library crate will continue to use version 1 even after version 2 comes out, avoiding that problem.

Even if Rust-Bio will never make backwards-incompatible changes, it would then never have its major version changed, and so bio = "1" would also work fine in that scenario.