Bump minor version to 2.2.0

package.json

@@ -1,6 +1,6 @@
 {
   "name": "lexiconga",
-  "version": "2.1.7",
+  "version": "2.2.0",
   "description": "The quick and easy dictionary builder for constructed languages.",
   "main": "template-index.html",
   "repository": "https://github.com/Alamantus/Lexiconga.git",

src/php/router.php

@@ -134,7 +134,7 @@ switch ($view) {
       oldLoad && oldLoad();
       if (UpUp) {
         UpUp.start({
-          'cache-version': '2.1.7',
+          'cache-version': '2.2.0',
           'content-url': 'offline.html',
           'assets': [
             \"" . implode('","', $files) . "\"