fix formatting

Author: sluger

rollup.config.js

@@ -4,15 +4,15 @@ import commonjs from 'rollup-plugin-commonjs';
 import babel from 'rollup-plugin-babel';
 
 export default {
-    external: ['chart.js'],
-    output: {
-        file: 'build/Plugin.Errorbars.js',
-        format: 'umd',
-        globals: {
-            'chart.js': 'Chart'
-        },
-        name: 'PluginErrorbars'
+  external: ['chart.js'],
+  output: {
+    file: 'build/Plugin.Errorbars.js',
+    format: 'umd',
+    globals: {
+      'chart.js': 'Chart'
     },
+    name: 'PluginErrorbars'
+  },
   plugins: [
     resolve(),
     commonjs(),