ANN: C-Blosc2 3.1.4 is out!

[Francesc Alted]

# Announcing C-Blosc2 3.1.4
A fast, compressed, and persistent binary data store library for C.

## What is new?

This is a maintenance release extending the security hardening from 3.1.3
to the **ndcell** and **ndmean** plugin filters.  Malformed or
attacker-crafted ``b2nd`` metalayers could previously trigger heap buffer
overflows in these filters by exploiting 32-bit block-size arithmetic.
Both plugins now validate block geometry in 64-bit to prevent overflows.

Additionally, this release fixes a thread-pool memory leak that was
especially visible under WebAssembly/Pyodide, and a potential SEGV on
demand when the parallel backend fails to initialize.  RISC-V targets
are now also properly recognized in the CMake build system.

Thanks to @metsw24-max, @saddamr3e and @carlosqwqqwq for their 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 library](https://www.blosc.org/posts/prize-push-Blosc2)
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