- update to 6.1.16:
* Added support for Python 3.13
* Introduced the PLATFORMIO_SYSTEM_TYPE environment variable,
enabling manual override of the detected system type for
greater flexibility and control in custom build environments
* Enhanced internet connection checks by falling back to HTTPS
protocol when HTTP (port 80) fails (issue #4980)
* Upgraded the build engine to the latest version of SCons
(4.8.1) to improve build performance, reliability, and
compatibility with other tools and systems (release notes)
* Upgraded the Doctest testing framework to version 2.4.11, the
GoogleTest to version 1.15.2, and the Unity to version 2.6.0,
incorporating the latest features and improvements for
enhanced testing capabilities
* Corrected an issue where the incorrect public class was
imported for the ``DoctestTestRunner`` (issue #4949)