Release v1.5.0 on 2023-02-07.

1. 5561f11 clean up mutex, scopedlock, and signal classes by Eric · 1 year, 11 months ago
2. 21d03d3 Add SPDX annotation by Pau Espin Pedrol · 4 years, 11 months ago
3. bdb970e cosmetic: Fix trailing whitespace in several files by Pau Espin Pedrol · 4 years, 11 months ago
4. 9436fbb transceiver: Fix mismatched allocations and deallocations by pierre.baudry · 8 years ago
5. 28670fb iface: Add inner ring-buffer implementation by Tom Tsou · 9 years ago