xkbcommon: finer grain requirements

[ericLemanissier]

Specify library name and version: xkbcommon/*

blocked by:

• add xkeyboard-config/system #13594

this is a consequence of #13592

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• I've read the guidelines for contributing.
• I've followed the PEP8 style guides for Python code in the recipes.
• I've used the latest Conan client version.
• I've tried at least one configuration locally with the conan-center hook activated.

[ghost]

I detected other pull requests that are modifying xkbcommon/all recipe:

• xkbcommon: Use PkgConfigDeps build context for wayland #13612

This message is automatically generated by https://github.com/ericLemanissier/conan-center-conflicting-prs so don't hesitate to report issues/improvements there.

[conan-center-bot]

All green in build 2 (ec8a6c6ad8024064e3c61ed8f513e5c055c27476):

• xkbcommon/1.3.0@:
  All packages built successfully! (All logs)

• xkbcommon/1.4.1@:
  All packages built successfully! (All logs)

• xkbcommon/1.3.1@:
  All packages built successfully! (All logs)

• xkbcommon/1.4.0@:
  All packages built successfully! (All logs)

• xkbcommon/1.0.3@:
  All packages built successfully! (All logs)

• xkbcommon/1.1.0@:
  All packages built successfully! (All logs)

• xkbcommon/1.0.1@:
  All packages built successfully! (All logs)

• xkbcommon/0.10.0@:
  All packages built successfully! (All logs)

• xkbcommon/1.2.1@:
  All packages built successfully! (All logs)