Added ability to cancel request

[SecondeJK]

This PR adds the cancel request endpoint.

How Has This Been Tested?

Test added for success - no tests added for the other responses are they are handled by the APIResource client.

Types of changes

• [ ] Bug fix (non-breaking change which fixes an issue)
• [x] New feature (non-breaking change which adds functionality)
• [ ] Breaking change (fix or feature that would cause existing functionality to change)

Checklist:

• [x] My code follows the code style of this project.
• [ ] My change requires a change to the documentation.
• [ ] I have updated the documentation accordingly.
• [ ] I have read the CONTRIBUTING document.
• [x] I have added tests to cover my changes.
• [x] All new and existing tests passed.

[codecov-commenter]

Codecov Report

Merging #405 (dc04550) into main (8dc0f5b) will increase coverage by 0.44%. The diff coverage is 80.00%.

@@             Coverage Diff              @@
##               main     #405      +/-   ##
============================================
+ Coverage     77.58%   78.02%   +0.44%     
- Complexity     1934     1997      +63     
============================================
  Files           190      191       +1     
  Lines          5153     5325     +172     
============================================
+ Hits           3998     4155     +157     
- Misses         1155     1170      +15     

Impacted Files	Coverage Δ
src/Verify2/ClientFactory.php	0.00% <0.00%> (ø)
src/Verify2/Client.php	100.00% <100.00%> (ø)

... and 4 files with indirect coverage changes

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