Add support for firebase-admin v13

[taeold]

Fixes #1640

[marco-mastella]

the issue is still there

npm error code ERESOLVE
npm error ERESOLVE could not resolve
npm error
npm error While resolving: firebase-functions-test@3.3.0
npm error Found: firebase-admin@13.0.1
npm error node_modules/firebase-admin
npm error   firebase-admin@"^13.0.1" from the root project
npm error   peer firebase-admin@"^11.10.0 || ^12.0.0 || ^13.0.0" from firebase-functions@6.1.2
npm error   node_modules/firebase-functions
npm error     firebase-functions@"^6.1.2" from the root project
npm error     peer firebase-functions@">=4.9.0" from firebase-functions-test@3.3.0
npm error     node_modules/firebase-functions-test
npm error       dev firebase-functions-test@"^3.3.0" from the root project
npm error
npm error Could not resolve dependency:
npm error peer firebase-admin@"^8.0.0 || ^9.0.0 || ^10.0.0 || ^11.0.0 || ^12.0.0" from firebase-functions-test@3.3.0
npm error node_modules/firebase-functions-test
npm error   dev firebase-functions-test@"^3.3.0" from the root project
npm error
npm error Conflicting peer dependency: firebase-admin@12.7.0
npm error node_modules/firebase-admin
npm error   peer firebase-admin@"^8.0.0 || ^9.0.0 || ^10.0.0 || ^11.0.0 || ^12.0.0" from firebase-functions-test@3.3.0
npm error   node_modules/firebase-functions-test
npm error     dev firebase-functions-test@"^3.3.0" from the root project
npm error
npm error Conflicting peer dependency: firebase-admin@12.7.0
npm error node_modules/firebase-admin
npm error   peer firebase-admin@"^8.0.0 || ^9.0.0 || ^10.0.0 || ^11.0.0 || ^12.0.0" from firebase-functions-test@3.3.0
npm error   node_modules/firebase-functions-test
npm error     dev firebase-functions-test@"^3.3.0" from the root project
npm error
npm error Fix the upstream dependency conflict, or retry
npm error this command with --force or --legacy-peer-deps
npm error to accept an incorrect (and potentially broken) dependency resolution.
npm error
npm error Conflicting peer dependency: firebase-admin@12.7.0
npm error node_modules/firebase-admin
npm error   peer firebase-admin@"^8.0.0 || ^9.0.0 || ^10.0.0 || ^11.0.0 || ^12.0.0" from firebase-functions-test@3.3.0
npm error   node_modules/firebase-functions-test
npm error     dev firebase-functions-test@"^3.3.0" from the root project
npm error   node_modules/firebase-functions-test
npm error     dev firebase-functions-test@"^3.3.0" from the root project
npm error     dev firebase-functions-test@"^3.3.0" from the root project
npm error Fix the upstream dependency conflict, or retry
npm error this command with --force or --legacy-peer-deps
npm error to accept an incorrect (and potentially broken) dependency resolution.