test: add e2e tests

fix: boolean attributes client side

test/components/hello-world.vue

@@ -0,0 +1,24 @@
+<template>
+  <div>Test</div>
+</template>
+
+<script>
+export default {
+  metaInfo() {
+    return {
+      title: this.title
+    }
+  },
+  data() {
+    return {
+      title: 'Hello World',
+      htmlAttrs: {
+        lang: 'en'
+      },
+      meta: [
+        { charset: 'utf-8' }
+      ]
+    }
+  }
+}
+</script>