add changelog and bump vsn for 2.2

Author: UmanShahzad

CHANGELOG.md

@@ -1,5 +1,13 @@
 # CHANGELOG
 
+### 2.2.0 (April 22nd 2021)
+
+- Added Maps integration.
+- Added versioned cache keys.
+  This allows more reliable changes to cached data in the future without
+  causing confusing incompatibilities. This should be transparent to the user.
+  This is primarily useful for users with persistent cache implementations.
+
 ### 2.1.1 (January 12 2021)
 
 - Bug fix issue reported in Laravel SDK

composer.json

@@ -48,7 +48,7 @@
     },
     "extra": {
         "branch-alias": {
-            "dev-master": "2.1-dev"
+            "dev-master": "2.2-dev"
         }
     },
     "config": {

src/IPinfo.php

@@ -169,7 +169,7 @@ public function getMapUrl($ips)
     private function buildHeaders()
     {
         $headers = [
-            'user-agent' => 'IPinfoClient/PHP/2.1',
+            'user-agent' => 'IPinfoClient/PHP/2.2',
             'accept' => 'application/json',
         ];