Fixed README.md; const changed to var in sandbox code

Author: DigitalBrainJS

README.md

@@ -45,11 +45,11 @@ Use unpkg.com cdn to get link to script/module from the package:
 ```
 - ESM ES2015 module (~14kB)
 ```html
-<script src="https://unpkg.com/safe-jsonp/dist/safe-jsonp.esm.js"></script>
+import JSONP from "https://unpkg.com/safe-jsonp/dist/safe-jsonp.esm.js"
 ```
 - minified ESM ES2015 module (~7kB)
 ```html
-<script src="https://unpkg.com/safe-jsonp/dist/safe-jsonp.esm.min.js"></script>
+import JSONP from "https://unpkg.com/safe-jsonp/dist/safe-jsonp.esm.min.js"
 ```
 
 

package-lock.json

@@ -1,6 +1,6 @@
 {
   "name": "safe-jsonp",
-  "version": "0.2.2",
+  "version": "0.2.3",
   "description": "safer jsonp client with sandbox and Promise support",
   "author": "Dmitriy Mozgovoy",
   "main": "index.js",

package.json

@@ -10,7 +10,7 @@ const injectResource = (imports) => Object.keys(imports).map((name) => {
         case "string":
             return resource;
         case "function":
-            return `const ${name}= ${resource.toString()}`;
+            return `var ${name}= ${resource.toString()}`;
         default:
             return resource.toString();
     }