Update version and changelog

Author: yanscalyr

dist/README.md

@@ -50,7 +50,7 @@ from GitHub.
     Stable version:
 
     ```bash
-    tar -xvf scalyr_grafana_plugin_d8b9a59.tar.gz
+    tar -xvf scalyr_grafana_plugin_44eb7da.tar.gz
     cp -rf dist/ /var/lib/grafana/plugins/scalyr/
     ```
 

dist/plugin.json

@@ -6,7 +6,7 @@
   "name": "Scalyr",
   "id": "scalyr-datasource",
   "info": {
-    "version": "2.1.0",
+    "version": "2.2.0",
     "description": "Scalyr Observability Platform",
     "author": {
       "name": "Scalyr",