chore(eslint-config-prettier): upgrade prettier and extend configuration (#2932)

Author: michalsnik

packages/@vue/eslint-config-prettier/index.js

@@ -2,7 +2,8 @@ module.exports = {
   plugins: ['prettier'],
   extends: [
     'eslint:recommended',
-    require.resolve('eslint-config-prettier')
+    require.resolve('eslint-config-prettier'),
+    require.resolve('eslint-config-prettier/vue')
   ],
   rules: {
     'prettier/prettier': 'warn'

packages/@vue/eslint-config-prettier/package.json

@@ -21,8 +21,8 @@
   },
   "homepage": "https://github.com/vuejs/vue-cli/tree/dev/packages/@vue/eslint-config-prettier#readme",
   "dependencies": {
-    "eslint-config-prettier": "^3.1.0",
+    "eslint-config-prettier": "^3.3.0",
     "eslint-plugin-prettier": "^3.0.0",
-    "prettier": "^1.14.3"
+    "prettier": "^1.15.2"
   }
 }