v1.8.2

1. Enhancements:
   • Save rig names instead of IDs to prevent Hamlib off by one issues. (PR #256)
2. Bugfixes:
   • Increase plot buffer size to resolve issues with "To Spkr/Headphones" tab (PR #258)
3. Build system:
   • Depend on Codec2 1.0.5. (PR #259)