Hang when a directory must be ignored due to e.g. many files or circular references, but the gitignore that instructs to ignore it is not in the root.

[chrissimon-au]

Describe the bug
See discussion on #108 .

To Reproduce

|--- app.glossary.yml
|--- src/
 |--- node_modules/ <-- contains circular links
 |--- .gitignore <-- contains `node_modules` as an ignore entry

This will fail to find app.glossary.yml because the glob search operation will 'hang' while searching node_modules. the .gitignore in the src folder doesn't apply because the hang occurs when we are searching for .gitignore files in the first place.

Expected behavior
It should ignore node_modules because of the adjacent .gitignore and as a result, not hang and eventually find app.glossary.yml

Additional context

gitignore support was first added on #109