MtJpGraph support added (#2979)

#2979

Co-authored-by: Mikhail Oleynik <mishutka@mito-team.com>

Author: f1mishutka

CHANGELOG.md

@@ -11,6 +11,8 @@ and this project adheres to [Semantic Versioning](https://semver.org).
 
 - Implementation of the new `TEXTBEFORE()`, `TEXTAFTER()` and `TEXTSPLIT()` Excel Functions
 - Implementation of the `ARRAYTOTEXT()` Excel Function
+- Support for [mitoteam/jpgraph](https://packagist.org/packages/mitoteam/jpgraph) implementation of
+  JpGraph library to render charts added.
 
 ### Changed
 

README.md

@@ -71,16 +71,18 @@ or the appropriate PDF Writer wrapper for the library that you have chosen to in
 
 #### Chart Export
 
-For Chart export, we support, which you will also need to install yourself
- - jpgraph/jpgraph
+For Chart export, we support following packages, which you will also need to install yourself using `composer require`
+ - [jpgraph/jpgraph](https://packagist.org/packages/jpgraph/jpgraph) (this package was abandoned at version 4.0. 
+   You can manually download the latest version that supports PHP 8 and above from [jpgraph.net](https://jpgraph.net/))
+ - [mitoteam/jpgraph](https://packagist.org/packages/mitoteam/jpgraph) (fork with php 8.1 support)
 
 and then configure PhpSpreadsheet using:
 ```php
-Settings::setChartRenderer(\PhpOffice\PhpSpreadsheet\Chart\Renderer\JpGraph::class);
+Settings::setChartRenderer(\PhpOffice\PhpSpreadsheet\Chart\Renderer\JpGraph::class); // to use jpgraph/jpgraph
+//or
+Settings::setChartRenderer(\PhpOffice\PhpSpreadsheet\Chart\Renderer\MtJpGraphRenderer::class); // to use mitoteam/jpgraph
 ```
 
-You can `composer/require` the github version of jpgraph, but this was abandoned at version 4.0; or manually download the latest version that supports PHP 8 and above from [jpgraph.net](https://jpgraph.net/)
-
 ## Documentation
 
 Read more about it, including install instructions, in the [official documentation](https://phpspreadsheet.readthedocs.io). Or check out the [API documentation](https://phpoffice.github.io/PhpSpreadsheet).

phpstan.neon.dist

@@ -11,6 +11,8 @@ parameters:
         - tests/
     excludePaths:
         - src/PhpSpreadsheet/Chart/Renderer/JpGraph.php
+        - src/PhpSpreadsheet/Chart/Renderer/JpGraphRendererBase.php
+        - src/PhpSpreadsheet/Chart/Renderer/MtJpGraphRenderer.php
     parallel:
         processTimeout: 300.0
     checkMissingIterableValueType: false