Drop support for Ember < 3.28

.github/workflows/ci.yml

@@ -109,9 +109,6 @@ jobs:
       fail-fast: false
       matrix:
         ember-try-scenario:
-          - ember-lts-3.16
-          - ember-lts-3.20
-          - ember-lts-3.24
           - ember-lts-3.28
           - ember-lts-4.4
           - ember-lts-4.8

README.md

@@ -14,7 +14,7 @@ FastBoot).
 
 ## Installation
 
-FastBoot requires Ember 2.3 or higher. It is also preferable that your app is running `ember-cli` 2.12.0 and higher.
+FastBoot requires Ember 3.28 or higher. It is also preferable that your app is running `ember-cli` 3.28.0 and higher.
 
 From within your Ember CLI application, run the following command:
 

test-packages/ember-cli-fastboot-testing-app/.eslintrc.js

@@ -46,8 +46,13 @@ module.exports = {
       rules: {
         // this can be removed once the following is fixed
         // https://github.com/mysticatea/eslint-plugin-node/issues/77
-        'node/no-unpublished-require': 'off'
-      }
-    }
-  ]
+        'node/no-unpublished-require': 'off',
+      },
+    },
+    {
+      // Test files:
+      files: ['tests/**/*-test.{js,ts}'],
+      extends: ['plugin:qunit/recommended'],
+    },
+  ],
 };

test-packages/ember-cli-fastboot-testing-app/config/ember-cli-update.json

@@ -0,0 +1,20 @@
+{
+  "schemaVersion": "1.0.0",
+  "packages": [
+    {
+      "name": "ember-cli",
+      "version": "3.28.6",
+      "blueprints": [
+        {
+          "name": "app",
+          "outputRepo": "https://github.com/ember-cli/ember-new-output",
+          "codemodsSource": "ember-app-codemods-manifest@1",
+          "isBaseBlueprint": true,
+          "options": [
+            "--no-welcome"
+          ]
+        }
+      ]
+    }
+  ]
+}

test-packages/ember-cli-fastboot-testing-app/config/targets.js

@@ -6,12 +6,20 @@ const browsers = [
   'last 1 Safari versions'
 ];
 
-const isCI = !!process.env.CI;
-const isProduction = process.env.EMBER_ENV === 'production';
-
-if (isCI || isProduction) {
-  browsers.push('ie 11');
-}
+// Ember's browser support policy is changing, and IE11 support will end in
+// v4.0 onwards.
+//
+// See https://deprecations.emberjs.com/v3.x#toc_3-0-browser-support-policy
+//
+// If you need IE11 support on a version of Ember that still offers support
+// for it, uncomment the code block below.
+//
+// const isCI = Boolean(process.env.CI);
+// const isProduction = process.env.EMBER_ENV === 'production';
+//
+// if (isCI || isProduction) {
+//   browsers.push('ie 11');
+// }
 
 module.exports = {
   browsers

test-packages/ember-cli-fastboot-testing-app/package.json

@@ -25,30 +25,30 @@
     "ember-auto-import": "^2.6.3",
     "ember-cli": "~4.1.0",
     "ember-cli-app-version": "^3.2.0",
-    "ember-cli-babel": "^7.20.5",
+    "ember-cli-babel": "^7.26.10",
     "ember-cli-dependency-checker": "^3.2.0",
     "ember-cli-fastboot": "workspace:*",
     "ember-cli-fastboot-testing": "^0.5.0",
-    "ember-cli-htmlbars": "^5.1.2",
+    "ember-cli-htmlbars": "^5.7.2",
     "ember-cli-inject-live-reload": "^2.0.2",
     "ember-cli-sri": "^2.1.1",
     "ember-cli-uglify": "^3.0.0",
-    "ember-data": "~3.19.0",
+    "ember-data": "~3.28.6",
     "ember-export-application-global": "^2.0.1",
     "ember-fetch": "^8.0.1",
     "ember-load-initializers": "^2.1.1",
     "ember-maybe-import-regenerator": "^0.1.6",
     "ember-qunit": "^4.6.0",
     "ember-resolver": "^8.0.0",
-    "ember-source": "~3.19.0",
+    "ember-source": "~3.28.8",
     "ember-template-lint": "^2.8.0",
     "eslint": "^7.1.0",
     "eslint-plugin-ember": "^8.6.0",
     "eslint-plugin-node": "^11.1.0",
     "loader.js": "^4.7.0",
     "npm-run-all": "^4.1.5",
-    "qunit-dom": "^1.2.0",
-    "webpack": "^5.89.0"
+    "qunit-dom": "^1.6.0",
+    "webpack": "^5.110.3"
   },
   "ember": {
     "edition": "octane"

test-packages/test-scenarios/package.json

@@ -15,7 +15,6 @@
     "@glimmer/component": "^2.1.1",
     "body-parser": "^1.18.3",
     "chai": "^4.3.7",
-    "ember-cli-3.16": "npm:ember-cli@~3.16.0",
     "ember-cli-3.28": "npm:ember-cli@~3.28.0",
     "ember-cli-4.12": "npm:ember-cli@~4.12.0",
     "ember-cli-5.12": "npm:ember-cli@~5.12.0",
@@ -31,7 +30,6 @@
     "ember-qunit": "^9.1.0",
     "ember-resolver": "^13.2.0",
     "ember-service-import-polyfill": "^1.0.0",
-    "ember-source-3.16": "npm:ember-source@~3.16.0",
     "ember-source-3.28": "npm:ember-source@~3.28.0",
     "ember-source-4.12": "npm:ember-source@~4.12.0",
     "ember-source-5.12": "npm:ember-source@~5.12.0",

test-packages/test-scenarios/scenarios.mjs

@@ -10,14 +10,6 @@ export function baseApp() {
   });
 }
 
-/**
- * @param {Project} project
- */
-async function lts_3_16(project) {
-  project.linkDevDependency('ember-source', { baseDir: '.', resolveName: 'ember-source-3.16' });
-  project.linkDevDependency('ember-cli', { baseDir: '.', resolveName: 'ember-cli-3.16' });
-}
-
 /**
  * @param {Project} project
  */
@@ -84,7 +76,6 @@ async function release(project) {
  */
 function supportMatrix(scenarios) {
   return scenarios.expand({
-    lts_3_16,
     lts_3_28,
     lts_4_12,
     lts_5_12,