Use Node 20 in all the build/test workflows

[sequba]

Context

• use node 20 in all the workflows
• mention node 20 as the recommended version for HyperFormula developers in the docs

How did you test your changes?

• run all the workflows in the GH environment

Types of changes

• Breaking change (a fix or a feature because of which an existing functionality doesn't work as expected anymore)
• New feature or improvement (a non-breaking change that adds functionality)
• Bug fix (a non-breaking change that fixes an issue)
• Additional language file, or a change to an existing language file (translations)
• Change to the documentation

Related issues:

1. Fixes Run all build scripts in Node Active LTS (currently 20) #1428

Checklist:

• I have reviewed the guidelines about Contributing to HyperFormula and I confirm that my code follows the code style of this project.
• I have signed the Contributor License Agreement.
• My change is compliant with the OpenDocument standard.
• My change is compatible with Microsoft Excel.
• My change is compatible with Google Sheets.
• I described my changes in the CHANGELOG.md file.
• My changes require a documentation update.
• My changes require a migration guide.

[github-actions]

Performance comparison of head (0361c4e) vs base (df4ddc9)

                                     testName |   base |   head | change
------------------------------------------------------------------------
                                      Sheet A | 515.98 | 504.27 | -2.27%
                                      Sheet B | 165.91 | 166.78 | +0.52%
                                      Sheet T |  149.5 |  144.6 | -3.28%
                                Column ranges | 516.98 | 509.26 | -1.49%
Sheet A:  change value, add/remove row/column |  14.22 |  13.39 | -5.84%
 Sheet B: change value, add/remove row/column | 130.12 | 127.64 | -1.91%
                   Column ranges - add column | 152.33 | 152.99 | +0.43%
                Column ranges - without batch | 470.94 | 438.94 | -6.79%
                        Column ranges - batch | 113.12 | 112.13 | -0.88%