Support central package management

If central package management is used [CCG0009](https://cake-contrib.github.io/CakeContrib.Guidelines/rules/ccg0009) is always raised with a message like this:

```
Cake.Core is referenced in version . Recommended version is 5.0.0. (see https://cake-contrib.github.io/CakeContrib.Guidelines/rules/ccg0009)
```