[BUG] Missing compatible Angular versions

[Tezra]

Expected behavior

Peer dependencies should include the 2 Angular versions after the compiler version.

Observed behavior

Peer dependencies are capped at compiler version.

Why is this an issue

Angular maintains backwards compatibility for at least 2 major versions, meaning a project that is compiled with Angular 20 is guaranteed to work for version 21 and 22, and varying milage after that. This 2 lead gap should be kept whenever the compiler updates as well.

[ZenMasterJacob20011]

I'm not sure I am understanding. It looks like @formio/angular supports 4 major versions of angular if you look at our peer dependencies

"@angular/core": "^16.0.0 || ^17.0.0 || ^18.0.0 || ^19.0.0",
"@angular/common": "^16.0.0 || ^17.0.0 || ^18.0.0 || ^19.0.0",
"@angular/elements": "^16.0.0 || ^17.0.0 || ^18.0.0 || ^19.0.0",

It looks like we are using "@angular-devkit/build-angular": "^19.0.6", as well. So we are maintaining backwards compatibility for the last two major versions. Could you please clarify what the issue is?

[Tezra]

@lane-formio Angular Itself is guaranteed to be backwards compatible for at least 2 versions. So as long as no deprecated APIs are used, That means that what is compiled using Angular 19 is guaranteed to work and Angular 20 and 21 as well. So it should be ^16.0.0 || ^17.0.0 || ^18.0.0 || ^19.0.0 || ^20.0.0 || ^21.0.0 since the Angular 19 compiler is used.

[travist]

I am fine adding versions to the package.json that reflect Angular's policies with regards to backwards compatibility. If any PR is made to reflect this desire, then we would be happy to pull in that change.