Update copyright to include all contributors

LICENSE.md

@@ -1,6 +1,6 @@
 The MIT License (MIT)
 
-Copyright (c) 2017 Simon Brunel
+Copyright (c) 2016-2021 chartjs-plugin-deferred contributors
 
 Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
 

rollup.config.js

@@ -1,14 +1,11 @@
 const pkg = require('./package.json');
 
-const banner = `/*
+const banner = `/*!
  * @license
- * ` + pkg.name + `
- * http://chartjs.org/
- * Version: ` + pkg.version + `
- *
- * Copyright ` + (new Date().getFullYear()) + ` Simon Brunel
- * Released under the MIT license
- * https://github.com/chartjs/` + pkg.name + `/blob/master/LICENSE.md
+ * ${pkg.name} v${pkg.version}
+ * ${pkg.homepage}
+ * (c) 2016-${new Date().getFullYear()} ${pkg.name} contributors
+ * Released under the ${pkg.license} license
  */`;
 
 export default {