test on ember 4.8, 4.12

Author: Gaurav0

.github/workflows/ci.yml

@@ -69,6 +69,8 @@ jobs:
           - ember-lts-3.24
           - ember-lts-3.28
           - ember-lts-4.4
+          - ember-lts-4.8
+          - ember-lts-4.12
           - ember-release
           - ember-beta
           - ember-canary

config/ember-try.js

@@ -53,6 +53,24 @@ module.exports = async function () {
           },
         },
       },
+      {
+        name: 'ember-lts-4.8',
+        npm: {
+          devDependencies: {
+            'ember-source': '~4.8.0',
+            bootstrap: bootstrapVersion,
+          },
+        },
+      },
+      {
+        name: 'ember-lts-4.12',
+        npm: {
+          devDependencies: {
+            'ember-source': '~4.12.0',
+            bootstrap: bootstrapVersion,
+          },
+        },
+      },
       {
         name: 'ember-release',
         npm: {