This patch bumps up support for creating valid JSON paths from references. It addresses #48 and makes invalid specs, valid! This addresses issues #48 and #45 that report references cannot be found. Now `libopenapi` can support much more funky lookups.
The case checking seems kinda dumb now looking back at this code. I am not sure why I felt the need to do that, however after being aware of it for some time and not being happy with the extra cycles it puts the code through.
This change removes ConvertCase from the utils package, as it's no longer used or needed right now. If it needs co come back, we can re-add the code, but deleting code always makes me happy.
It also removed a dependency from the project, which reduces the footprint, great!
A single line that tries to read an HTTP response body and fails is very hard to test without mocking, and the mock does not add value to a single line of code to check for an error that can rarely ever be triggered. Going to settle for 99.9% for now.
