Errors need to kill the build

[ottenhoff]

Sakai depends on this tool for a build. If it errors, we need the entire build to stop via an exit(1)

Here is a sample of an error during empathise:

[INFO] --- frontend:1.12.0:npm (npm empathise) @ webcomponents ---
[INFO] Running 'npm run empathise -- --query=version=63068' in /mnt/builder/svn/sakai_patcher/165_distros_22.x_/webcomponents/tool/src/main/frontend
[INFO] 
[INFO] > [email protected] empathise
[INFO] > empathise install "--query=version=63068"
[INFO] 
[INFO] Staging asset dependencies at /tmp/asset_stageU1C51A
[INFO] Writing temporary asset manifest...
[INFO] Installing modules to asset stage...
[INFO] Unable to stage assets for specifier conversion
[INFO] Error: Command failed: npm i
[INFO] npm ERR! code E500
[INFO] npm ERR! 500 Internal Server Error - GET https://registry.npmjs.org/@fortawesome%2ffontawesome-free - KV GET failed: 401 Unauthorized
[INFO] 
[INFO] npm ERR! A complete log of this run can be found in:
[INFO] npm ERR!     /home/sakai/.npm/_logs/2023-10-30T20_17_18_394Z-debug.log
[INFO] 
[INFO]     at ChildProcess.exithandler (node:child_process:397:12)
[INFO]     at ChildProcess.emit (node:events:394:28)
[INFO]     at maybeClose (node:internal/child_process:1064:16)
[INFO]     at Process.ChildProcess._handle.onexit (node:internal/child_process:301:5) {
[INFO]   killed: false,
[INFO]   code: 1,
[INFO]   signal: null,
[INFO]   cmd: 'npm i',
[INFO]   stdout: '',
[INFO]   stderr: 'npm ERR! code E500\n' +
[INFO]     'npm ERR! 500 Internal Server Error - GET https://registry.npmjs.org/@fortawesome%2ffontawesome-free - KV GET failed: 401 Unauthorized\n' +
[INFO]     '\n' +
[INFO]     'npm ERR! A complete log of this run can be found in:\n' +
[INFO]     'npm ERR!     /home/sakai/.npm/_logs/2023-10-30T20_17_18_394Z-debug.log\n'
[INFO] }
[INFO] Assets installed to "assets" 🖖
[INFO]