Update `note-c` and improve experience

v1.3.9 (#69)

* remove note-c before re-add
* Squashed 'src/note-c/' content from commit 27fdad1
git-subtree-dir: src/note-c
git-subtree-split: 27fdad1b2ec08637c8caacfa0d747bb2faf6e180

* rls: v1.3.9

version 1.3.8 missed because of library properties file
- resolves user-agent bug
- adds `B0` and `CS` (shared pin) defines for Swan