Not modified fixes

[jschlyter]

We need to update time_out on 304, or we'll keep asking the remote every time.

(includes commits from #44)

[codecov]

Codecov Report

Merging #45 into master will decrease coverage by 0.01%.
The diff coverage is 80.00%.

@@            Coverage Diff             @@
##           master      #45      +/-   ##
==========================================
- Coverage   77.73%   77.72%   -0.02%     
==========================================
  Files          38       38              
  Lines        3805     3807       +2     
  Branches      743      743              
==========================================
+ Hits         2958     2959       +1     
- Misses        610      611       +1     
  Partials      237      237              

Impacted Files	Coverage Δ
src/cryptojwt/key_bundle.py	81.05% <80.00%> (-0.11%)	⬇️

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[jschlyter]

I would really appreciate a release after this has been merged :-)