fix exlude examples

[penguinpee]

• Fix exclusion of examples/

[penguinpee]

See for more information the setuptools docs (the note and important boxes at the end of the linked section).

[anilbey]

Thanks @penguinpee for finding out and fixing it.

I confirm with this change the examples are not added to the wheel. The .whl file is slightly smaller in size.

Before

216K ├── bluepyopt-1.14.12-py3-none-any.whl

After

208K ├── bluepyopt-1.14.12.1-py3-none-any.whl