feat: Add mixins for store and model

This allows for better composition, and to not have Ember Data as a dependency

addon/mixins/task-model.js

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+import Ember from 'ember';
+import { task } from 'ember-concurrency';
+
+export default Ember.Mixin.create({
+  save() {
+    let promise = this._super(...arguments);
+    return this.get('wrap').perform(promise);
+  },
+
+  reload() {
+    let promise = this._super(...arguments);
+    return this.get('wrap').perform(promise);
+  },
+
+  destroyRecord() {
+    let promise = this._super(...arguments);
+    return this.get('wrap').perform(promise);
+  },
+
+  wrap: task(function * (promise) {
+    let result = yield promise;
+    return result;
+  })
+});

addon/mixins/task-store.js

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+import Ember from 'ember';
+import { task } from 'ember-concurrency';
+
+export default Ember.Mixin.create({
+  findAll() {
+    let promise = this._super(...arguments);
+    return this.get('wrap').perform(promise);
+  },
+
+  query() {
+    let promise = this._super(...arguments);
+    return this.get('wrap').perform(promise);
+  },
+
+  findRecord() {
+    let promise = this._super(...arguments);
+    return this.get('wrap').perform(promise);
+  },
+
+  queryRecord() {
+    let promise = this._super(...arguments);
+    return this.get('wrap').perform(promise);
+  },
+
+  wrap: task(function * (promise) {
+    let result = yield promise;
+    return result;
+  })
+});

tests/unit/mixins/task-model-test.js

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+import Ember from 'ember';
+import TaskModelMixin from 'ember-data-tasks/mixins/task-model';
+import { module, test } from 'qunit';
+
+module('Unit | Mixin | task model');
+
+// Replace this with your real tests.
+test('it works', function(assert) {
+  let TaskModelObject = Ember.Object.extend(TaskModelMixin);
+  let subject = TaskModelObject.create();
+  assert.ok(subject);
+});

tests/unit/mixins/task-store-test.js

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+import Ember from 'ember';
+import TaskStoreMixin from 'ember-data-tasks/mixins/task-store';
+import { module, test } from 'qunit';
+
+module('Unit | Mixin | task store');
+
+// Replace this with your real tests.
+test('it works', function(assert) {
+  let TaskStoreObject = Ember.Object.extend(TaskStoreMixin);
+  let subject = TaskStoreObject.create();
+  assert.ok(subject);
+});