fix: can't upload dSYM files

[bobbyg603]

Description

Ignore folders for everything but dSYM in order to support uploading from symsrv based file heirarchy. In the symsrv case for dSYM, the symbol doesn't appear to be stored with the .dSYM extension eg bugsplat.app.dSYM is laid out as bu/bugsplattester/2dd1bd2706fa384da5a3a8265921cf9a/bugsplattester.

Fixes #137

Checklist

• [x] Tested manually
• [x] Unit tests pass with no errors or warnings
• [x] Documentation updated (if applicable)
• [x] Reviewed by at least 1 other contributor