CI workflows not aligned with supported Node.js versions

[MikeMcC399]

Issue

CI workflows are not aligned with the current set of supported Node.js versions. These versions are currently:

Node.js 18.x, 20.x, 22.x and 23.x.

Node.js versions < 18.x belong to End-of-Life Releases.

Workflow	Uses Node.js
.github/workflows/test-macos.yml	current, 16, 14, 12, 10, 8, 6, 4
.github/workflows/test-ubuntu.yml	current, 16, 14, 12, 10, 8, 6, 4
.github/workflows/test-windows.yml	current, 16, 14, 12, 10, 8, 6, 4
.github/workflows/lint.yml	environment default: v10.24.1

• Node.js versions < 18.x are tested, although they are no longer supported
• Node.js versions 18.x, 20.x, 22.x are not being tested
• Node.js version 23.x (equivalent to current) is the only currently supported version being tested.