fill in missing ember-try scenarios

Author: mansona

.github/workflows/ci.yml

@@ -76,6 +76,8 @@ jobs:
       matrix:
         ember-try-scenario:
          - ember-lts-3.8
+         - ember-lts-3.12
+         - ember-lts-3.16
          - ember-lts-3.20
          - ember-lts-3.24
          - ember-lts-3.28

config/ember-try.js

@@ -16,6 +16,24 @@ module.exports = async function () {
           },
         },
       },
+      {
+        name: 'ember-lts-3.12',
+        npm: {
+          devDependencies: {
+            'ember-source': '~3.12.0',
+            'ember-cli': '~3.12.0',
+          },
+        },
+      },
+      {
+        name: 'ember-lts-3.16',
+        npm: {
+          devDependencies: {
+            'ember-source': '~3.16.0',
+            'ember-cli': '~3.16.0',
+          },
+        },
+      },
       {
         name: 'ember-lts-3.20',
         npm: {