feat!: move eslint:recommended to a separate recommended config

BREAKING CHANGE:
`eslint:recommended` is no longer included in the default
configuration. Users of the old version need to update their `extends`
to use `@vue/prettier/recommended`, or
`['eslint:recommended', '@vue/prettier]`.

Fixes #3

index.js

@@ -1,7 +1,6 @@
 module.exports = {
   plugins: ['prettier'],
   extends: [
-    'eslint:recommended',
     require.resolve('eslint-config-prettier'),
     require.resolve('eslint-config-prettier/vue')
   ],

recommended.js

@@ -0,0 +1,6 @@
+module.exports = {
+  extends: [
+    'eslint:recommended',
+    require.resolve('./index')
+  ]
+}