Tests verify url

[hionay]

• added a CA certificate for testing (I had to remove *.pem line from .gitignore)
• added tests for verifying URL

closes #8

[codecov-commenter]

Codecov Report

Merging #9 (494121e) into main (cbc0b89) will increase coverage by 3.30%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##             main       #9      +/-   ##
==========================================
+ Coverage   80.00%   83.30%   +3.30%     
==========================================
  Files           7        7              
  Lines         635      635              
==========================================
+ Hits          508      529      +21     
+ Misses         99       79      -20     
+ Partials       28       27       -1     

Impacted Files	Coverage Δ
commands/verify/verify.go	92.30% <100.00%> (+16.15%)	⬆️

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[yakuter]

This is great :) Thank you @hionay 👍