title: Prettier doesn't work for changing double quote to single quote in visual code
body: <p>I work with EsLint and Prettier in visual code. Everything work well without singlequote and doublequote.</p>
  
  <p>This is my .eslintrc file:
  <code>{
      "parser": "babel-eslint",
      "plugins": ["prettier"],
      "rules": {
          "prettier/prettier": [
            "error",
          {
            "singleQuote": true
          }
          ]
        }
   }</code>
  When I use ctr+ shift+P and type "format Document". the double quote didn't change to single quote. If I use autofix, it changes but when I save it, the single quote turn into double quote. </p>
  
  <p>How can I fix that problem.</p>