Solve the programming task below in a Python markdown code block.
Write a function `consonantCount`, `consonant_count` or `ConsonantCount` that takes a string of English-language text and returns the number of consonants in the string.

Consonants are all letters used to write English excluding the vowels `a, e, i, o, u`.
Also feel free to reuse/extend the following starter code:
```python
def consonant_count(s):
```