Solve new ESLint errors

- Name components under layouts, pages with 2+ words
- Stop repeating same variables between data and asyncData

Author: hmsk

layouts/default.vue

@@ -3,3 +3,9 @@
     <nuxt />
   </div>
 </template>
+
+<script lang="ts">
+export default {
+  name: 'LayoutDefault'
+}
+</script>

pages/index.vue

@@ -14,4 +14,7 @@
 </template>
 
 <script lang="ts">
+export default {
+  name: 'PageIndex'
+}
 </script>

pages/options-api.vue

@@ -72,9 +72,7 @@ export default Vue.extend({
   data () {
     return {
       message: "I'm defined on data()",
-      fetchedTodos: [] as ToDo[],
-      asyncMessage: 'I will be overwritten by asyncData',
-      userAgent: 'I will be overwritten by asyncData'
+      fetchedTodos: [] as ToDo[]
     }
   },