Support Node.js 18

[legobeat]

• Enable node.js 18.x in CI
• lavapack, browserify: bump deps necessary to unbreak node.js 18:
  • source-map-explorer@^2.5.2->2.5.3
  • source-map@^0.7.3->^0.7.4
  • convert-source-map@^1.8.0->^1.9.0
  • Failing test
  • Upstream issue
• core/tests: Add WebAssembly to scuttleGlobalThis.exceptions in tests
  • Required to pass under node.js 18
• Note that under under certain conditions, running with scuttling enabled requires the following configuration change from:

{
  "scuttleGlobalThis": {
    "exceptions": []
  }
}

to:

{
  "scuttleGlobalThis": {
    "exceptions": ["WebAssembly"]
  }
}