feat: upgrade to Angular 18

[bobbyg603]

PR Checklist

Please check if your PR fulfills the following requirements:

• The commit message follows our guidelines: https://github.com/CirclonGroup/angular-tree-component/blob/master/CONTRIBUTING.md#commit-message-guidelines
• Tests for the changes have been added (for bug fixes / features)

PR Type

What kind of change does this PR introduce?

[ ] Bugfix [x] Feature [ ] Code style update (formatting, local variables) [ ] Refactoring (no functional changes, no api changes) [ ] Build related changes [ ] CI related changes [ ] Documentation content changes [ ] Other... Please describe: 

What is the current behavior?

Closes #915

What is the new behavior?

Adds support for Angular 13 and builds library as 'partial' Ivy

Does this PR introduce a breaking change?

[x] Yes [ ] No 

Other information

• Add eslint
• Add core-js
• Enable Ivy
• Enable Aot
• Fix polyfills
• Fix lint errors
• Fix template compilation errors
• Fix example-app build
• Fix docs-app build
• Fix cyclical component references (New cyclical dependency errors in library with compilationMode: partial angular/angular#43227 (comment))

BREAKING CHANGE: Library is now built with 'partial' Ivy

[bobbyg603]

@jodaka can you please merge this change? We would like to deprecate our fork. Thanks!

[jodaka]

I wish I could! I'm just a casual user of angular-tree-component and would love to see this PR merged.
No idea why I had enough rights to review/approve your PR but I certainly don't have rights to merge it.

[bobbyg603]

I wish I could! I'm just a casual user of angular-tree-component and would love to see this PR merged. No idea why I had enough rights to review/approve your PR but I certainly don't have rights to merge it.

ha! dang you could've fooled me 🙂. really disappointing to see libraries get abandoned by their maintainers.

[ikruglik]

I wish I could! I'm just a casual user of angular-tree-component and would love to see this PR merged. No idea why I had enough rights to review/approve your PR but I certainly don't have rights to merge it.

ha! dang you could've fooled me 🙂. really disappointing to see libraries get abandoned by their maintainers.

@bobbyg603 , @jodaka have you a forked version of the lib yet with the Angular 13+ supported?

[bobbyg603]

@ikruglik yes, our forked version that targets Angular 13 can be found on npm

npm i @bugsplat/angular-tree-component

https://github.com/BugSplat-Git/angular-tree-component/blob/release/projects/angular-tree-component/package.json

[bobbyg603]

hi @tobiasengelhardt, I've updated this project to use Angular 18. It's been 3 years since the last commit, perhaps you might let us take over the project?

[tobiasengelhardt]

@bobbyg603 I wish I could, but I have no rights to merge, push or change anything in this project.