Add tests for count_repositories

src/count.rs

@@ -5,7 +5,7 @@ use std::{fs::{read_dir, ReadDir}, path::Path, result::Result as StdResult, iter
 /// so to get the amount of repos, we just have to count everything
 /// in `*/*/*` to get the count.
 #[instrument]
-pub(crate) fn count_repositories<P>(repo_path: P) -> Result<usize>
+pub fn count_repositories<P>(repo_path: P) -> Result<usize>
 where
     P: AsRef<Path> + std::fmt::Debug,
 {