Add LTS Ember 5.4 and 5.8 to see if ember-beta and ember-canary are broken

Author: NullVoxPopuli

.github/workflows/ci-build.yml

@@ -48,6 +48,8 @@ jobs:
           - ember-lts-4.4
           - ember-lts-4.8
           - ember-lts-4.12
+          - ember-lts-5.4
+          - ember-lts-5.8
           - ember-release
           - ember-beta
           - ember-canary

addon/tests/dummy/config/ember-try.js

@@ -61,6 +61,22 @@ module.exports = async function () {
           },
         },
       },
+      {
+        name: 'ember-lts-5.4',
+        npm: {
+          devDependencies: {
+            'ember-source': '~5.4.0',
+          },
+        },
+      },
+      {
+        name: 'ember-lts-5.8',
+        npm: {
+          devDependencies: {
+            'ember-source': '~5.8.0',
+          },
+        },
+      },
       {
         name: 'ember-release',
         npm: {