Make scripts terminate with a non-zero error code upon failure.

packages/usb/apply-config.js

@@ -1,6 +1,8 @@
 #!/usr/bin/env node
 const uhk = require('./uhk');
 
+process.on('unhandledRejection', e => {throw e});
+
 (async function() {
     const device = uhk.getUhkDevice();
     uhk.applyConfig(device);