fix: 🐛 credential library update (#3328)

* fix: 🐛 update credential library serializer

* test: 💍 adds acceptance test

* test: 💍 fix test

* fix: 🐛 fix test

* test: 💍 adds a11y ignore

* chore: 🤖 pr feedback

addons/api/tests/unit/serializers/credential-library-test.js

@@ -138,6 +138,45 @@ module('Unit | Serializer | credential library', function (hooks) {
     });
   });
 
+  test('it serializes credential library updates without credential_type', function (assert) {
+    const store = this.owner.lookup('service:store');
+    const serializer = store.serializerFor('credential-library');
+    store.push({
+      data: {
+        id: '1',
+        type: 'credential-library',
+        attributes: {
+          type: TYPE_CREDENTIAL_LIBRARY_VAULT_GENERIC,
+          name: 'Name',
+          description: 'Description',
+          path: '/vault/path',
+          http_method: 'GET',
+          version: 1,
+          credential_type: null,
+          credential_mapping_overrides: {},
+        },
+      },
+    });
+    const record = store.peekRecord('credential-library', '1');
+    const snapshot = record._createSnapshot();
+    const serializedRecord = serializer.serialize(snapshot);
+
+    assert.deepEqual(serializedRecord, {
+      type: TYPE_CREDENTIAL_LIBRARY_VAULT_GENERIC,
+      credential_store_id: null,
+      name: 'Name',
+      description: 'Description',
+      credential_type: null,
+      credential_mapping_overrides: null,
+      attributes: {
+        path: '/vault/path',
+        http_method: 'GET',
+        http_request_body: null,
+      },
+      version: 1,
+    });
+  });
+
   test('it does not serialize http_request_body unless http_method is set to POST', function (assert) {
     const store = this.owner.lookup('service:store');
     const record = store.createRecord('credential-library', {