Prep backend-explicit-tests for merge

[mattsb42-aws]

Given the relative number of changes, I figured it would be better to merge master into backend-explicit-tests first before merging backend-explicit-tests into master. That way the changes are smaller and more reviewable.

Next step from here will simply be merging backend-explicit-tests into master.

[codecov]

Codecov Report

Merging #128 into backend-explicit-tests will decrease coverage by <.01%.
The diff coverage is 100%.

@@ Coverage Diff @@## backend-explicit-tests #128 +/- ##
==========================================================
- Coverage 96.53% 96.52% -0.01% 
==========================================================
Files 14 14 Lines 1068 1065 -3 ==========================================================
- Hits 1031 1028 -3 
Misses 37 37

Impacted Files	Coverage Δ
jose/jwt.py	100% <100%> (ø)	⬆️

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[zejn]

Looks good to me.