v21.0.1

Angular 21 patch release.

• Replaces undeclared lodash imports with tree-shakable lodash-es imports
• Updates Angular 21 tooling to current patch releases
• Updates date-fns to ^4.4.0, lodash-es to ^4.18.1, and qs to ^6.15.3
• Adds reproducible build, pack, and publish commands
• Restores a clean lint run and adds Firefox-based browser testing
• Verified with 73 passing browser tests

Install with:

npm install ngx-esy-jsonapi@21.0.1