expose `not_before` and `not_after` cert validity params

[dopstar]

[codecov[bot]]

Codecov Report

Merging #455 (4cfd43e) into master (6728e36) will not change coverage. The diff coverage is 100.00%.

@@            Coverage Diff            @@
##            master      #455   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files           10        10           
  Lines         1169      1253   +84     
  Branches        46        52    +6     
=========================================
+ Hits          1169      1253   +84     

Impacted Files	Coverage Δ
trustme/__init__.py	100.00% <100.00%> (ø)
trustme/_cli.py	100.00% <100.00%> (ø)
trustme/tests/test_cli.py	100.00% <0.00%> (ø)
trustme/tests/test_trustme.py	100.00% <0.00%> (ø)
a/trustme/trustme/tests/test_cli.py	100.00% <0.00%> (ø)
a/trustme/trustme/tests/test_trustme.py	100.00% <0.00%> (ø)
...sers/runner/work/trustme/trustme/tests/test_cli.py	100.00% <0.00%> (ø)
.../runner/work/trustme/trustme/tests/test_trustme.py	100.00% <0.00%> (ø)

[pquentin]

HI! Thanks for the polished contribution. We'll also need to improve the docs and add a changelog.

However, what is the use case for setting not_before/not_after for the root CA?

[pquentin]

Closing for now as I did not get an answer to my questions above.