Plans for v9 release

[mkszepp]

• Improve typescript story (remove any types) and make necessary changes Improve addon typing & convert helpers to plain functions #1906
• Drop support for ember < 4.12 (Drop support for ember < 4.12 #1961)
• Convert helpers to plain functions and drop ember/component/helper usages (works with ember 4.5+) (Improve addon typing & convert helpers to plain functions #1906)
• Remove blueprints (Remove setup blueprints #1962)
• Drop support for old dependencies/peerDependencies (Drop support for old dependencies/peerDependencies #1963)
• Drop support for passing components as string (Improve addon typing & convert helpers to plain functions #1906)
• Remove @embroider/util (deprecated and not anymore needed after dropping option to pass components as string & gts convert, since ember 3.25 its recommended to pass component) (Convert addon to gts & remove @embroider/util #1960)
• Convert addon to gts (Convert addon to gts & remove @embroider/util #1960)
• Add css variables support (Add css variables support & drop passing $ember-power-select-line-height without unit #1965)
  • Change behavior for $ember-power-select-line-height => pass always with unit
• Remove automatically added ember-basic-dropdown (Remove automatically added ember-basic-dropdown styles, Convert to modern scss api, Drop node-scss support & Remove built-in CSS/SCSS themes for Bootstrap and Material #1964)
• Drop support for node-sass (Remove automatically added ember-basic-dropdown styles, Convert to modern scss api, Drop node-scss support & Remove built-in CSS/SCSS themes for Bootstrap and Material #1964)
• Fix scss deprecations (Remove automatically added ember-basic-dropdown styles, Convert to modern scss api, Drop node-scss support & Remove built-in CSS/SCSS themes for Bootstrap and Material #1964)
• Remove built-in CSS/SCSS themes for Bootstrap and Material (Remove automatically added ember-basic-dropdown styles, Convert to modern scss api, Drop node-scss support & Remove built-in CSS/SCSS themes for Bootstrap and Material #1964)
• Fix Accessibility issue in label component (Fix Accessibility issue in label component (default should be div instead label tag) #1966)
• Move to glint v2 (Move to glint v2 #1968)
  • Convert test-app to gts (Convert test app to gts #1967)
• Remove ember-assign-helper dependency (Remove ember-assign-helper dependency #1969)
• Migrate to new addon v2 blueprint https://github.com/ember-cli/ember-addon-blueprint (Convert to new addon v2 blueprint #1971)
• Drop support for ArrayProxy (not recommended since 3.x, ember data has deprecated in 4.x cycle, makes possible to remove dependency of addObserver/removeObserver) (Drop support for Ember ArrayProxy, PromiseProxyMixin, ObjectProxy & remove last addObserver/removeObserver/@ember/utils usages #1974)
• Check, if there is possibile to drop dependency of @ember/utils after ArrayProxy drop (use native ways, works better with TypeScript, it will be deprecated in Polaris) (Drop support for Ember ArrayProxy, PromiseProxyMixin, ObjectProxy & remove last addObserver/removeObserver/@ember/utils usages #1974)
• Remove added deprecations in v8.x (Remove deprecations & modernize e.keyCode with e.key #1976)

Target date: tba