Swap out miniball for pip version

[catanzaromj]

We have a custom version of miniball included with cechmate. Let's try to use the version avaible on pypi, potentially pinning it to match the requirements of cechmate.

[ctralie]

Sounds good!

[catanzaromj]

Here's where our implementation comes from: https://github.com/hbf/miniball. This is the one we should include as a pip dependency