Add Python 3.8 as supported runtime

[AutomatedTester]

No description provided.

[coveralls]

Pull Request Test Coverage Report for Build 95

• 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 95.492%

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Totals
Change from base Build 93:	0.0%
Covered Lines:	466
Relevant Lines:	488

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💛 - Coveralls

[AutomatedTester]

Updated the pytest requirement as Travis was pulling an older version for some reason.

[belm0]

@mehaase there is no CI coverage for 3.5

[AutomatedTester]

I did see there is #112 for that and I am happy to add it into this PR to get rid of it unless you want to support it. I only need 3.6+

[belm0]

yes I forgot about #112 and PR #84

PR contribution is welcome, but that should be a separate PR

[AutomatedTester]

Raised #138

[belm0]

Updated the pytest requirement as Travis was pulling an older version for some reason.

Well, the CI dependencies are not pinned. Opened #137.

But yes, I recall that 3.8 needs a more recent pytest-- I assume you were hitting that.

[AutomatedTester]

Updated the pytest requirement as Travis was pulling an older version for some reason.

Well, the CI dependencies are not pinned. Opened #137.

But yes, I recall that 3.8 needs a more recent pytest-- I assume you were hitting that.

It's not a 3.8 issue per se but the latest pytest-cov need 4.6 or later. I didn't hit it locally since I got the latest version from pypi but weirdly travis seemed to pick up pytest 4.3 so it failed.