Updated CI and dependencies. Dropped support for Node 12 and Ember 3.24 LTS.

ijlee2 commented 1 year ago

Description

As a part of https://github.com/emberjs/ember.js/issues/20162 and https://github.com/ember-cli/ember-welcome-page/issues/387, I will create a few pull requests to update this repo, so that we can ease future maintenance.

I made the following changes in this pull request:

Commit 1: Dropped support for Node 12. When we are ready to cut a release, we will want to announce a major version.
Commits 2-4: Updated CI to be readable and make use of v3 actions (caching is simpler). Note that CI failed (error message: Cannot find module '@babel/core'), even though I didn't change any code.
Commits 5-10: Ran ember-cli-update to update ember-source from 3.28.8 to 4.9.3. Note that CI passed after updating the packages.
Commits 11-12: Replaced scenario-tester with ember-try (better documentation and support currently). Dropped Ember 3.20 and 3.24 from the test matrix. Added Ember 3.28 and 4.4 to the test matrix.
Commit 13: Updated the minimum supported versions in README.

bertdeblock commented 1 year ago

A bit late, but we can also added LTS 4.8 to the test scenario's?

ijlee2 commented 1 year ago

@bertdeblock Yep, I think adding 4.8 now is a good idea.

At the moment, I'm investigating why CI failed after merging the PR (seems to be an issue with dependencies). I'll get to both issues soon.

ijlee2 commented 1 year ago

The failed CI run seems to be related to a recent change in ember-qunit@v6.1.0.