Add a LICENSE.txt

[netsettler]

• Add a LICENSE.txt file for MIT license (matching what's already in pyproject.toml)
• Bump patch version.
• Update change log.

All very pro forma.

[coveralls]

Pull Request Test Coverage Report for Build 4822957502

• 0 of 0 changed or added relevant lines in 0 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage remained the same at 75.621%

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Totals
Change from base Build 4812791962:	0.0%
Covered Lines:	6970
Relevant Lines:	9217

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💛 - Coveralls