Describe the bug

npx gulp release isn't reliably building the zip file we need. It bundles the incorrect files more often than not.

Steps to reproduce the bug

1. Run npx gulp release
2. View compiled zipfile in `dist → uswds-{version}.zip
3. Go inside folder
4. View incomplete package
   

Expected behavior

Outputs same as dist:

dist
├── CONTRIBUTING.md
├── LICENSE.md
├── README.md
├── css
├── fonts
├── img
├── js
└── scss

Screenshots

Actual (varies):

Expected:

System setup

• USWDS version: 2.10.2
• Device: Thinkpad
• Operating system: Win10
• Gulp: 4.0.2
• Node: v14.15.4

Additional context

Release tasks can be found in config/gulp/release.js