changes-5.12.3

Qt for Python 5.12.3 is a bug-fix release.

For more details, refer to the online documentation included in this
distribution. The documentation is also available online:

https://doc.qt.io/qtforpython/

Some of the changes listed in this file include issue tracking numbers
corresponding to tasks in the Qt Bug Tracker:

https://bugreports.qt.io/

Each of these identifiers can be entered in the bug tracker to obtain more
information about a particular change.

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*                                  PySide2                                 *
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 - [PYSIDE-993] Use correct environment variable to detect when running in Coin
 - Many updated to the documentation
 - Add array modification for QGLShaderProgram::setAttributeArray(int,const float *v,int,int)
 - Signatures: Add support for PySide2.QtCore.short/ushort/signed char
 - Add explicit methods for QOpenGLShaderProgramm.setUniformValue (i/f)

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*                                  Shiboken2                               *
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 - [PYSIDE-977] Shiboken: Add "noexcept" to wrapper when wrapped function is noexcept
 - [PYSIDE-975] shiboken: Allow for include paths with relative directories
 - [PYSIDE-995] shiboken: Enable adding call operators
 - shiboken: Move the Api extractor documentation into shiboken
 - shiboken: Fix code injection not working for operator functions
 - shiboken: Enable including typesystem XML snippets via entities