fix: trailing commas at entrypoints, fixes #1226

Author: theKashey

Diff for: .prettierignore

@@ -4,4 +4,8 @@ node_modules/
 dist/
 package.json
 CHANGELOG.md
-.cache
+.cache
+babel.js
+index.js
+patch.js
+root.js

Diff for: root.js

@@ -5,15 +5,15 @@ if (module.hot) {
   if (!module.parents || module.parents.length === 0) {
     throw new Error(
       'React-Hot-Loader: `react-hot-loader/root` is not supported on your system. ' +
-        'Please use `import {hot} from "react-hot-loader"` instead',
+        'Please use `import {hot} from "react-hot-loader"` instead'
     );
   }
   // access parent
   var parent = cache[module.parents[0]];
   if (!parent) {
     throw new Error(
       'React-Hot-Loader: `react-hot-loader/root` is not supported on your system. ' +
-        'Please use `import {hot} from "react-hot-loader"` instead',
+        'Please use `import {hot} from "react-hot-loader"` instead'
     );
   }
   // remove self from a cache