Switch to Node.js v20 before we can upgrade @polkadot dependencies

[atodorov]

@polkadot/[email protected]: The engine "node" is incompatible with this module. Expected version ">=18". Got "16.20.2"

initially detected in #1445

[github-actions]

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[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (d3c9e7d) 71.83% compared to head (68b7005) 71.83%.

Additional details and impacted files

@@           Coverage Diff           @@
##              dev    #1504   +/-   ##
=======================================
  Coverage   71.83%   71.83%           
=======================================
  Files         111      111           
  Lines       12961    12961           
  Branches      128      128           
=======================================
  Hits         9311     9311           
  Misses       3640     3640           
  Partials       10       10           

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[nathanwhit]

Looks good, not sure whether the CI failures are caused by these changes or if it's unrelated @atodorov.

[atodorov]

Looks good, not sure whether the CI failures are caused by these changes or if it's unrelated @atodorov.

Yeah, IDK about that. Everything appears to loog good still there are 2 important CI jobs which fail. I don't feel comfortable merging this PR just yet.

I'll poke around it a bit more to see if I can find something else.

[atodorov]

Looks good, not sure whether the CI failures are caused by these changes or if it's unrelated @atodorov.

So I switched from Node.js v18 to v20 and both the extrinsics check job and the cli integration test job worked the first time around. Given we're already using v20 for Creditcoin3 I think we can make the switch here too. WDYT ?