Add Kava Mainnet Chain (2222)

[0xRaghu]

Add New Chain 2222

Checklist

• The branch is named as add-chain-<chainId>.
• I haven't modified the chains.json file directly.
• In sourcify-chains.ts file
  • I've set supported: true.
  • I've set monitored: false.
  • I haven't added an rpc field but the one in chains.json is used (if not, please explain why).
• I've added a test in chain-tests.js file.
• test-new-chain test in Circle CI is passing.

_{View in Huly HI-660}

[codecov]

Codecov Report

Patch coverage: 50.00% and project coverage change: -7.88 ⚠️

Comparison is base (c3d9f10) 79.47% compared to head (9bbb319) 71.59%.

❗ Current head 9bbb319 differs from pull request most recent head fb163a8. Consider uploading reports for the commit fb163a8 to get more accurate results

Additional details and impacted files

@@             Coverage Diff             @@
##           staging    #1087      +/-   ##
===========================================
- Coverage    79.47%   71.59%   -7.88%     
===========================================
  Files           55       66      +11     
  Lines         1520     2394     +874     
  Branches       267      440     +173     
===========================================
+ Hits          1208     1714     +506     
- Misses         181      466     +285     
- Partials       131      214      +83     

Flag	Coverage Δ
lib-sourcify	66.19% <ø> (?)
server	74.59% <50.00%> (-4.88%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
...ommon/SourcifyEventManager/SourcifyEventManager.ts	100.00% <ø> (ø)
src/sourcify-chains.ts	84.31% <ø> (ø)
src/server/server.ts	73.39% <42.85%> (-6.61%)	⬇️
src/common/errors/TooManyRequests.ts	50.00% <50.00%> (ø)
...rollers/verification/etherscan/etherscan.common.ts	19.04% <50.00%> (-56.76%)	⬇️
src/monitor/monitor.ts	85.15% <75.00%> (+1.56%)	⬆️

... and 14 files with indirect coverage changes

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