Drop chrono for time 0.3

[jmackie]

Fixes cargo audit complaint.

See chronotope/chrono#602

[codecov]

Codecov Report

Merging #194 (8fd0596) into main (f7334c7) will decrease coverage by 0.03%.
The diff coverage is 66.66%.

@@            Coverage Diff             @@
##             main     #194      +/-   ##
==========================================
- Coverage   84.21%   84.19%   -0.03%     
==========================================
  Files          83       83              
  Lines       15105    15111       +6     
==========================================
+ Hits        12720    12722       +2     
- Misses       2385     2389       +4     

Impacted Files	Coverage Δ
crates/ditto-cli/src/main.rs	64.84% <0.00%> (-2.10%)	⬇️
crates/ditto-cli/src/version.rs	97.67% <100.00%> (+0.11%)	⬆️

📣 We’re building smart automated test selection to slash your CI/CD build times. Learn more