fix: loop over forward slashes for relative dir, replace after urlencode

[tiller1010]

Fixes #63

• Loops over forward slashes for "../" relative path.
• Replaces URL-encoded forward slashes with the original slash.

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Comparison is base (78ee960) 63.99% compared to head (120ef45) 63.99%.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## v5.5.x #64 +/- ## ========================================= Coverage 63.99% 63.99% Complexity 1252 1252 ========================================= Files 53 53 Lines 3611 3611 ========================================= Hits 2311 2311 Misses 1300 1300 ```

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[williamdes]

Update: I am a bit unsatisfied about the current code, maybe I will refactor it a bit before merging this We should not have to split the path and re build it, it feels wrong