ANN: C-Blosc2 3.0.3 is out!

[Francesc Alted]

# Announcing C-Blosc2 3.0.3
A fast, compressed, and persistent binary data store library for C.

## What is new?

This release is a bugfix and hardening release:

* Harden frame parsing against malformed trailer lengths, invalid metalayer
  offsets and lengths, and lazy-chunk compressed sizes that extend past the
  end of a frame.

* Fix integer-overflow paths in b2nd chunk-size and slice-buffer
  calculations.

* Improve stdio and mmap I/O safety by validating streams, file sizes,
  offsets, integer conversions, and cleanup paths.

* Replace unsafe string formatting/concatenation in several helper paths with
  bounded operations and allocation checks.

* Validate negative indices in offset reordering.

Thanks to @metsw24-max and @uwezkhan for contributions to this release.

For more info, see the release notes in:

https://github.com/Blosc/c-blosc2/blob/main/RELEASE_NOTES.md

## What is it?

Blosc2 is a high-performance data container optimized for binary data.
Blosc2 is the next generation of Blosc, an [award-winning]
(https://www.blosc.org/posts/prize-push-Blosc2) library that has been
around for more than a decade.

Blosc2 expands the capabilities of Blosc by providing a higher level
container that is able to store many chunks on it (hence the super-block name).
It supports storing data on both memory and disk using the same API.
Also, it adds more compressors and filters.

## Download sources

The github repository is over here:

https://github.com/Blosc/c-blosc2

Blosc is distributed using the BSD license, see LICENSE.txt
for details.

## Mailing list

There is an official Blosc mailing list at:

bl...@googlegroups.com
https://groups.google.com/g/blosc


Enjoy Data!
- The Blosc Development Team