v5.2.0 - Adds auto-repair button & fixes exporting firmware 2.3 GB Camera photos

What's Changed

• Re-applies the fix for older (semi-unsupported) macOS versions
• Adds an auto-repair feature by @neil-morrison44 in #333
• Handles photo export for post-2.3 save states by @neil-morrison44 in #335
• Adds auto repairs for any JSON errors in Cores / Platforms (found on the TS side) by @neil-morrison44 in #336

Full Changelog: v5.1.0...v5.2.0