Bump the sourcegenerators-tests-all group with 1 update

[dependabot]

Updated CSharpier from 1.2.6 to 1.3.0.

Release notes

Sourced from CSharpier's releases.

1.3.0

1.3.0

Breaking Changes

Change xml formatting to return error when it runs into syntax error so it is consistent with c# #​1854

Previously CSharpier treated an invalid xml file as a warning instead of an error. This was inconsistent with how it treated c# files.
Invalid c# or xml files are not treated as errors.
The --compilation-errors-as-warnings argument has been renamed to --syntax-errors-as-warnings and can be used to return warnings instead of errors when encountering invalid files.

What's Changed

Feature: Configurable whitespace handling for xml #​1790

CSharpier now supports two types of xml whitespace formatting strict or ignore.
By default all xml except xaml or axaml is treated as strict whitespace. See details

Feature: Move closing bracket for xml elements to the same line. #​1598

With strict xml whitespace handling, csharpier now keeps the closing bracket for an element on the same line instead of breaking it to a new line.

<!-- input & expected output -->
<ElementWithAttribute Attribute="AttributeValue__________________"
  >TextValue</ElementWithAttribute>

<!-- 1.2.6 -->
<ElementWithAttribute Attribute="AttributeValue__________________"
  >TextValue</ElementWithAttribute
>

Feature: Support for csharpier-ignore with XML formatter #​1788

CSharpier now supports csharpier-ignore in xml files. See details

Feature: Add MSBuild transitive and multi-target support #​1833

CSharpier.MSBuild can now work as a transitive dependency.

Feature: allow checking formatting with cache #​1830

The csharpier check command now supports a --use-cache option.

Feature: remove dependency on Microsoft.AspNetCore.App #​1508

Previously CSharpier required that Microsoft.AspNetCore.App be installed. CSharpier has been modified to use an HttpListener when it is run using server to remove the need for this dependency.

Fix: csharpier-ignore comment removes linespaces before block #​1867

CSharpier was removing blank lines before csharpier-ignore comments in some cases

// input and expected output
var x = 1;
    
// csharpier-ignore
var y=1;

/// 1.2.6
var x = 1;
// csharpier-ignore
var y=1;
 ... (truncated)

Commits viewable in [compare view](https://github.com/belav/csharpier/compare/1.2.6...1.3.0).
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</details>

<!-- CURSOR_SUMMARY -->
---

> [!NOTE]
> **Low Risk**
> Tooling-only version pin with no application runtime impact; possible CI/local format-check differences due to CSharpier 1.3.0 XML and error-handling changes.
> 
> **Overview**
> **Bumps the local .NET tool pin for CSharpier from 1.2.6 to 1.3.0** in `.config/dotnet-tools.json`, which drives `dotnet csharpier` in devcontainers and in the **CSharpier Check** / **CSharpier Auto Format** workflows when that file changes.
> 
> The diff also reformats the `commands` entry to a multi-line array; behavior is unchanged. Upstream **1.3.0** treats invalid XML as a formatting error (unless `--syntax-errors-as-warnings` is used), renames `--compilation-errors-as-warnings`, and changes XML whitespace/closing-bracket formatting—so CI or local `csharpier check` on mixed C#/XML repos may behave differently than on 1.2.6.
> 
> <sup>Reviewed by [Cursor Bugbot](https://cursor.com/bugbot) for commit 78743528ffc7274a0cd70940cb820fa149676005. Bugbot is set up for automated code reviews on this repo. Configure [here](https://www.cursor.com/dashboard/bugbot).</sup>
<!-- /CURSOR_SUMMARY -->

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[dependabot]

Superseded by #221.