Interface toggle (#459)

* Add icon prop overrides to checkbox

* Fix color example in storybook

* Add block style mode to checkbox base componet

* Add toggle interface

src/interfaces/toggle/toggle.test.ts

@@ -0,0 +1,20 @@
+import InterfaceToggle from './toggle.vue';
+import { createLocalVue, shallowMount } from '@vue/test-utils';
+import VueCompositionAPI from '@vue/composition-api';
+import VCheckbox from '@/components/v-checkbox';
+import VIcon from '@/components/v-icon';
+
+const localVue = createLocalVue();
+localVue.use(VueCompositionAPI);
+localVue.component('v-checkbox', VCheckbox);
+localVue.component('v-icon', VIcon);
+
+describe('Interfaces / Toggle', () => {
+	it('Renders a v-checkbox', () => {
+		const component = shallowMount(InterfaceToggle, {
+			localVue,
+		});
+
+		expect(component.find(VCheckbox).exists()).toBe(true);
+	});
+});