CI for macOS and windows always fails

[ElianHugh]

Describe the bug
mac and windows test runners always fail for all PRs, no matter if the PR in question has no issues with it. The failure is because the runners are crashing, which cancels all other test runners in the process.

Details

Run GabrielBB/xvfb-action@v1.0
/Users/runner/hostedtoolcache/node/16.20.1/arm64/bin/npm run test

> r@2.8.2 pretest
> tsc -p ./


> r@2.8.2 test
> node ./out/test/runTest.js

Downloading VS Code 1.89.0 from https://update.code.visualstudio.com/1.89.0/darwin-arm64/stable
Downloading VS Code (130895428B)
Downloading VS Code [------------------------------] 3%Downloading VS Code [=-----------------------------] 6%Downloading VS Code [===---------------------------] 10%Downloading VS Code [====--------------------------] 14%Downloading VS Code [=====-------------------------] 17%Downloading VS Code [======------------------------] 21%Downloading VS Code [=======-----------------------] 25%Downloading VS Code [========----------------------] 28%Downloading VS Code [=========---------------------] 32%Downloading VS Code [==========--------------------] 36%Downloading VS Code [============------------------] 41%Downloading VS Code [==============----------------] 47%Downloading VS Code [===============---------------] 51%Downloading VS Code [=================-------------] 57%Downloading VS Code [==================------------] 61%Downloading VS Code [===================-----------] 65%Downloading VS Code [====================----------] 67%Downloading VS Code [=====================---------] 72%Downloading VS Code [=======================-------] 78%Downloading VS Code [========================------] 83%Downloading VS Code [==========================----] 90%Downloading VS Code [============================--] 95%Downloaded VS Code into /Users/runner/work/vscode-R/vscode-R/.vscode-test/vscode-darwin-arm64-1.89.0
Downloaded VS Code into /Users/runner/work/vscode-R/vscode-R/.vscode-test/vscode-darwin-arm64-1.89.0
Test error: Error: spawn /Users/runner/work/vscode-R/vscode-R/.vscode-test/vscode-darwin-arm64-1.89.0/Visual Studio Code.app/Contents/MacOS/Electron ENOENT
Exit code:   -2
Failed to run tests
Error: The process '/Users/runner/hostedtoolcache/node/16.20.1/arm64/bin/npm' failed with exit code 1

Some thoughs:

• @eitsupi has noted that the node version is very old (latest release is 22, we are on 16)
• https://github.com/GabrielBB/xvfb-action has been deprecated, a potential replacement is https://github.com/coactions/setup-xvfb