Revert the Vue changes from commit 089a7b5 (PR #69)

Fixes #70. While the PR was well intended, it unfortunately was breaking
change since it requires eslint-plugin-vue@5 while lots of people still
use version 4.

Also, sometimes there are layout rules that don't conflict with Prettier
but rather complement it. So it might make sense to keep a manual,
Prettier-specific list after all.

vue.js

@@ -1,8 +1,20 @@
 "use strict";
 
 module.exports = {
-  extends: "plugin:vue/no-layout-rules",
   rules: {
-    "vue/html-self-closing": 0
+    "vue/html-self-closing": 0,
+
+    "vue/html-closing-bracket-newline": "off",
+    "vue/html-closing-bracket-spacing": "off",
+    "vue/html-end-tags": "off",
+    "vue/html-indent": "off",
+    "vue/html-quotes": "off",
+    "vue/max-attributes-per-line": "off",
+    "vue/multiline-html-element-content-newline": "off",
+    "vue/mustache-interpolation-spacing": "off",
+    "vue/no-multi-spaces": "off",
+    "vue/no-spaces-around-equal-signs-in-attribute": "off",
+    "vue/script-indent": "off",
+    "vue/singleline-html-element-content-newline": "off"
   }
 };