Extend JSON compat to include "1.0"

[ablaom]

Closes #30

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 26.66%. Comparing base (58fbf2d) to head (21e3537).
⚠️ Report is 19 commits behind head on dev.

Additional details and impacted files

@@            Coverage Diff             @@
##              dev      #31      +/-   ##
==========================================
+ Coverage   25.00%   26.66%   +1.66%     
==========================================
  Files           2        2              
  Lines          72       75       +3     
==========================================
+ Hits           18       20       +2     
- Misses         54       55       +1     

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