List Crates that might be squatting

[szabgab]

There are some crates that were uploaded just to take the name, but there is no real code in them. It might be reasonable to upload a new crate and fill it with code only a few days later, but if it takes longer then it might be considered squatting.

Some measurements we might want to consider

• Only one or very few releases.
• No or very little code beyond "Hello world"
• Has no release for a long time (should 1 month be considered here?)