restore support for Ember 3.16

Author: jelhan

.github/workflows/ci.yml

@@ -58,6 +58,9 @@ jobs:
       matrix:
         scenario:
           - ember-lts-3.16
+          - ember-lts-3.20
+          - ember-lts-3.24
+          - ember-lts-3.28
           - ember-release
           - ember-beta
           - ember-canary

README.md

@@ -12,8 +12,8 @@ Compatibility
 
 * Ember Power Select v4 or above
 * Ember Bootstrap v4 or above
-* Ember.js v3.24 or above
-* Ember CLI v3.24 or above
+* Ember.js v3.16 or above
+* Ember CLI v3.16 or above
 * Node.js v12 or above
 
 

config/ember-try.js

@@ -7,6 +7,22 @@ module.exports = async function () {
   return {
     useYarn: true,
     scenarios: [
+      {
+        name: 'ember-lts-3.16',
+        npm: {
+          devDependencies: {
+            'ember-source': '~3.16.0',
+          },
+        },
+      },
+      {
+        name: 'ember-lts-3.20',
+        npm: {
+          devDependencies: {
+            'ember-source': '~3.20.0',
+          },
+        },
+      },
       {
         name: 'ember-lts-3.24',
         npm: {