feat: added support to highlight xml namespaces tags and attributes

[afu-dev]

Hello,

First time contributing to the Tempest ecosystem. I choosed a simple first issue just to get to know the project. Hope this help.

Here's a before/after on some XML code:

Before:

After:

Fixes #171.

[brendt]

I love it! And welcome 🙏

[coveralls]

Pull Request Test Coverage Report for Build 21830700724

Warning: This coverage report may be inaccurate.

This pull request's base commit is no longer the HEAD commit of its target branch. This means it includes changes from outside the original pull request, including, potentially, unrelated coverage changes.

• For more information on this, see Tracking coverage changes with pull request builds.
• To avoid this issue with future PRs, see these Recommended CI Configurations.
• For a quick fix, rebase this PR at GitHub. Your next report should be accurate.

Details

• 3 of 3 (100.0%) changed or added relevant lines in 3 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage remained the same at 92.71%

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Totals
Change from base Build 21818129189:	0.0%
Covered Lines:	1615
Relevant Lines:	1742

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💛 - Coveralls

[brendt]

Tagged: https://github.com/tempestphp/highlight/releases/tag/2.16.1