Fix unhandled ResultSet.json errors, prepare 1.6.0

[slvrtrn]

Summary

Resolves #309

Checklist

• Unit and integration tests covering the common scenarios were added
• A human-readable description of the changes was provided to include in CHANGELOG

[sonarcloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
100.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarCloud

[mshustov]

not needed?

[slvrtrn]

This is the exact part that produced unhandled exceptions.

for await (const rows of stream) {
  for (const row of rows) {
    result.push(row.json())
  }
}

achieves the same on the modern Node.js versions, but we can catch the error properly on the app side.