Tests

improve documentation for TrackItem #796

Job	Run time
cpython-lxml (3.7)	33s
cpython-lxml (3.8)	28s
cpython-lxml (3.9)	32s
pypy (pypy-3.7)	40s
static-tests (3.9)	46s
cpython-lxml (3.10)	33s
pypy (pypy-3.8)	35s
cpython-lxml (3.11)	33s
cpython-lxml (3.12)	43s
pypy (pypy-3.9)	31s
pypy (pypy-3.10)	33s
cpython (3.7)	29s
cpython (3.8)	33s
cpython (3.9)	36s
cpython (3.10)	25s
cpython (3.11)	30s
cpython (3.12)	41s
Build and publish to PyPI and TestPyPI	0s
	9m 41s

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