fix(flagd): improve targeting and fix fractional issue(#92)

[aepfli]

Note: the semver tests are disabled because the python semver lib does not allow v prefixes to the version

closes: #92

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 94.53%. Comparing base (d8e10c7) to head (dc6cd32).
Report is 44 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #105      +/-   ##
==========================================
+ Coverage   90.55%   94.53%   +3.98%     
==========================================
  Files           8       13       +5     
  Lines         180      476     +296     
==========================================
+ Hits          163      450     +287     
- Misses         17       26       +9     

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[toddbaert]

Thanks @aepfli !