Support obsolete cfg dat set datum message Fixes #64

[semuadmin]

pyubx2 Pull Request Template

Description

Add support for alternate versions of now-obsolete CFG-DAT SET message. There are two versions of this message type; one which takes a single unsigned integer (U2) representing a preset datum enumeration; the other takes a set of floats as manual datum settings. A modified get_dict() routine distinguishes between them by checking for a keyword of 'datumNum' or a payload length of 2 bytes.

Fixes #64

Testing

Please test all changes, however trivial, against the supplied unittest suite tests/test_*.py e.g. by executing the tests/testsuite.py module or using your IDE's native Python unittest integration facilities. Please describe any test cases you have amended or added to this suite to maintain >= 99% code coverage.

• [x] Tests added for both versions of CFG-DAT SET

Checklist:

• [x] My code follows the style guidelines of this project (see CONTRIBUTING.MD).
• [x] I have performed a self-review of my own code.
• [x] (if appropriate) I have cited my u-blox documentation source(s).
• [x] I have commented my code, particularly in hard-to-understand areas.
• [x] I have made corresponding changes to the documentation.
• [x] (if appropriate) I have added test cases to the tests/test_*.py unittest suite to maintain >= 99% code coverage.
• [x] I have tested my code against the full tests/test_*.py unittest suite.
• [x] My changes generate no new warnings.
• [x] Any dependent changes have been merged and published in downstream modules.
• [x] I understand and acknowledge that the code will be published under a BSD 3-Clause license.