Issue 554: Enable DLM. TAB

[dcslagel]

Description:

This pull-request is to fix #554 Reading las file with TAB DLM in ~version section result in KeyError: 'TAB'

Changes

• Add a TAB aplitter to the line_splitters in lasio/reader.py
• Add tests to verify tab dlm data is parsed

Test results:

---------- coverage: platform darwin, python 3.10.9-final-0 ----------
Name                       Stmts   Miss  Cover
----------------------------------------------
lasio/__init__.py             28      6    79%
lasio/convert_version.py      20     20     0%
lasio/defaults.py             12      0   100%
lasio/examples.py             42     10    76%
lasio/excel.py                88     34    61%
lasio/exceptions.py            6      0   100%
lasio/las.py                 495     64    87%
lasio/las_items.py           220     30    86%
lasio/las_version.py          54     14    74%
lasio/reader.py              470     19    96%
lasio/writer.py              200      9    96%
----------------------------------------------
TOTAL                       1635    206    87%
Coverage XML written to file coverage.xml

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Let me know if this change could be accepted (or rejected) or needs some additional changes to be approved and merged.

Thank you, DC