ensure test coverage with ember-changeset v4 (#89)

Author: jelhan

.github/workflows/ci.yml

@@ -70,6 +70,7 @@ jobs:
           # - ember-release
           # - ember-beta
           # - ember-canary
+          - ember-changeset-v4
           - embroider-safe
           - embroider-optimized
 

tests/dummy/config/ember-try.js

@@ -55,6 +55,15 @@ module.exports = async function () {
           },
         },
       },
+      {
+        name: 'ember-changeset-v4',
+        npm: {
+          devDependencies: {
+            'ember-changeset': '^4.2.0',
+            'ember-changeset-validations': '^4.2.0',
+          },
+        },
+      },
       embroiderSafe(),
       embroiderOptimized(),
     ],