fix: Reject JSON with duplicate keys

[bgrozev]

No description provided.

[codecov]

Codecov Report

Merging #2073 (189eb5b) into master (7a4dc8b) will increase coverage by 0.07%.
Report is 3 commits behind head on master.
The diff coverage is 16.66%.

Additional details and impacted files

@@             Coverage Diff              @@
##             master    #2073      +/-   ##
============================================
+ Coverage     44.23%   44.30%   +0.07%     
- Complexity     1924     1928       +4     
============================================
  Files           340      340              
  Lines         18879    18881       +2     
  Branches       2592     2593       +1     
============================================
+ Hits           8351     8366      +15     
+ Misses         9663     9650      -13     
  Partials        865      865              

Files	Coverage Δ
.../jitsi/videobridge/message/BridgeChannelMessage.kt	67.21% <100.00%> (+4.02%)	⬆️
.../kotlin/org/jitsi/nlj/transform/node/PcapWriter.kt	0.00% <0.00%> (ø)
...g/jitsi/videobridge/relay/RelayMessageTransport.kt	8.33% <0.00%> (-0.05%)	⬇️

... and 3 files with indirect coverage changes

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