Sep 10 update

[Kirbyrawr]

Types of changes

• [ ] Bug fix (non-breaking change which fixes an issue)
• [x] New feature (non-breaking change which adds functionality)
• [ ] Breaking change (fix or feature that would cause existing functionality to change)
• [ ] I have read the CONTRIBUTING document.
• [x] My code follows the code style of this project.
• [x] My change requires a change to the documentation.
• [ ] I have updated the documentation accordingly.
• [x] I have added tests to cover my changes.
• [x] All new and existing tests passed.

[coveralls]

Pull Request Test Coverage Report for Build 4slq98rclnst0io6

• 66 of 70 (94.29%) changed or added relevant lines in 2 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage increased (+0.2%) to 85.012%

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Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
stellar-dotnet-sdk/TimeBounds.cs	2	3	66.67%
stellar-dotnet-sdk/WebAuthentication.cs	64	67	95.52%
<!--	Total:	66	70	94.29%	-->

Totals
Change from base Build y3yvcndhc65m1q7i:	0.2%
Covered Lines:	4339
Relevant Lines:	5104

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💛 - Coveralls

[fracek]

LGTM.