Upgrade to untrusted 0.9 and ring 0.17

[djc]

No description provided.

[codecov]

Codecov Report

Merging #193 (301be4e) into main (3bea3e3) will decrease coverage by 0.06%.
Report is 1 commits behind head on main.
The diff coverage is 89.47%.

@@            Coverage Diff             @@
##             main     #193      +/-   ##
==========================================
- Coverage   96.50%   96.44%   -0.06%     
==========================================
  Files          19       20       +1     
  Lines        4465     4478      +13     
==========================================
+ Hits         4309     4319      +10     
- Misses        156      159       +3     

Files	Coverage Δ
src/alg_tests.rs	100.00% <100.00%> (ø)
src/cert.rs	97.58% <100.00%> (ø)
src/crl/mod.rs	97.50% <100.00%> (ø)
src/crl/types.rs	99.53% <100.00%> (ø)
src/der.rs	99.58% <100.00%> (+<0.01%)	⬆️
src/lib.rs	100.00% <100.00%> (ø)
src/verify_cert.rs	96.73% <71.42%> (-0.63%)	⬇️

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