uvw: add version 3.4.0

[toge]

Specify library name and version: uvw/3.4.0

skypjack/uvw@v3.3.0_libuv_v1.47...v3.4.0_libuv_v1.48

This is a small release in the uvw part.
But there are some important changes in libuv/1.7.8 required by uvw/3.4.0.
https://github.com/libuv/libuv/releases/tag/v1.48.0.

---

• I've read the contributing guidelines.
• I've used a recent Conan client version close to the currently deployed.
• I've tried at least one configuration locally with the conan-center hook activated.

[perseoGI]

LGTM

[conan-center-bot]

Conan v1 pipeline ✔️

All green in build 4 (5dcd1b572f4d8f769f69c0f9e5e4e9885135f513):

• uvw/3.4.0:
  All packages built successfully! (All logs)

• uvw/3.3.0:
  All packages built successfully! (All logs)

• uvw/3.2.0:
  All packages built successfully! (All logs)

• uvw/2.10.0:
  All packages built successfully! (All logs)

• uvw/2.12.1:
  All packages built successfully! (All logs)

• uvw/2.11.0:
  All packages built successfully! (All logs)

• uvw/3.1.0:
  All packages built successfully! (All logs)

---

Conan v2 pipeline ✔️

Note: Conan v2 builds are now mandatory. Please read our discussion about it.

All green in build 4 (5dcd1b572f4d8f769f69c0f9e5e4e9885135f513):

• uvw/3.4.0:
  All packages built successfully! (All logs)

• uvw/3.2.0:
  All packages built successfully! (All logs)

• uvw/3.1.0:
  All packages built successfully! (All logs)

• uvw/2.12.1:
  All packages built successfully! (All logs)

• uvw/3.3.0:
  All packages built successfully! (All logs)

• uvw/2.11.0:
  All packages built successfully! (All logs)

• uvw/2.10.0:
  All packages built successfully! (All logs)