Update the scenarios run by the CI suite

Author: mixonic

.github/workflows/ci.yml

@@ -62,11 +62,6 @@ jobs:
       matrix:
         try-scenario:
           [
-            ember-lts-2.12,
-            ember-lts-2.18,
-            ember-lts-3.16,
-            ember-lts-3.20,
-            ember-lts-3.24,
             ember-lts-3.28,
             ember-lts-4.4,
             ember-lts-4.8,
@@ -77,6 +72,9 @@ jobs:
             ember-3.28-with-jquery,
             ember-3.28-classic,
           ]
+        include:
+          - ember-try-scenario: ember-canary
+            allow-failure: true
 
     steps:
       - name: Checkout

tests/dummy/config/ember-try.js

@@ -7,66 +7,6 @@ module.exports = async function () {
   let emberReleaseVersion = await getChannelURL('release');
   return {
     scenarios: [
-      {
-        name: 'ember-lts-2.12',
-        npm: {
-          devDependencies: {
-            '@ember/test-helpers': '^1.7.3',
-            'ember-qunit': '^4.6.0',
-            'ember-source': '~2.12.0',
-            qunit: null,
-            'ember-resolver': '8.1.0',
-          },
-        },
-      },
-      {
-        name: 'ember-lts-2.18',
-        npm: {
-          devDependencies: {
-            '@ember/test-helpers': '^1.7.3',
-            'ember-qunit': '^4.6.0',
-            'ember-source': '~2.18.0',
-            qunit: null,
-            'ember-resolver': '8.1.0',
-          },
-        },
-      },
-      {
-        name: 'ember-lts-3.16',
-        npm: {
-          devDependencies: {
-            'ember-source': '~3.16.0',
-            'ember-resolver': '8.1.0',
-            '@ember/test-helpers': '2.2.9',
-            'ember-qunit': '~5.0.0',
-            'ember-cli': '^4.12.0',
-          },
-        },
-      },
-      {
-        name: 'ember-lts-3.20',
-        npm: {
-          devDependencies: {
-            'ember-source': '~3.20.5',
-            'ember-resolver': '8.1.0',
-            '@ember/test-helpers': '2.2.9',
-            'ember-qunit': '~5.0.0',
-            'ember-cli': '^4.12.0',
-          },
-        },
-      },
-      {
-        name: 'ember-lts-3.24',
-        npm: {
-          devDependencies: {
-            'ember-source': '~3.24.3',
-            'ember-resolver': '8.1.0',
-            '@ember/test-helpers': '2.2.9',
-            'ember-qunit': '~5.0.0',
-            'ember-cli': '^4.12.0',
-          },
-        },
-      },
       {
         name: 'ember-lts-3.28',
         npm: {