TOSA v0.50.0 serialization library release tag

- Added support for FP16 and BF16. Float data type renamed to FP32
- Updated the flatbuffers submodule to version 2.0.6.

1. 485a11d FP16 support in serialization by James Ward · 1 year, 11 months ago
2. 55b363b Avoid RTTI usage by Kevin Cheng · 2 years, 8 months ago
3. 2364dcd Initial commit of serialization library code by Eric Kunze · 3 years, 2 months ago