refacto: migrate to composition API everywhere

src/views/SpaceCowboy.vue

@@ -1,3 +1,6 @@
+<script lang="ts" setup>
+</script>
+
 <template>
   <main class="space-cowboy content">
     <p>
@@ -44,14 +47,6 @@
   </main>
 </template>
 
-<script lang="ts">
-import { defineComponent } from 'vue'
-
-export default defineComponent({
-  name: 'SpaceCowboy'
-})
-</script>
-
 <style scoped lang="scss">
 .space-cowboy {
   display: flex;