🔧[#45] add CSRF_COOKIE_HTTPONLY setting

[Coperh]

Fixes #45

Not sure if this value should be configurable or not.

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 85.62%. Comparing base (d9a4a86) to head (4ee7dc7).
Report is 39 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #55      +/-   ##
==========================================
+ Coverage   76.00%   85.62%   +9.62%     
==========================================
  Files           4        8       +4     
  Lines          50      153     +103     
==========================================
+ Hits           38      131      +93     
- Misses         12       22      +10     

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[stevenbal]

Not sure if this value should be configurable or not.

let's leave it hardcoded as it is now, since there's not much of a difference between the value being True or False and it's just to make auditors happy