Move prettier config into dedicated file, so vscode plugins pick it up

Author: BPScott

.eslintrc.js

@@ -11,7 +11,7 @@ module.exports = {
   env: { mocha: true },
   root: true,
   rules: {
-    'self/prettier': ['error', { singleQuote: true }],
+    'self/prettier': ['error'],
     'eslint-plugin/report-message-format': ['error', '^[^a-z].*\\.$']
   }
 };

.prettierrc

@@ -0,0 +1,3 @@
+{
+  "singleQuote": true
+}

.vscode/settings.json

@@ -5,7 +5,6 @@
     "**/.git": true,
     "**/node_modules": true
   },
-  "prettier.eslintIntegration": true,
   "search.exclude": {
     "**/node_modules": true
   }