Updated documentation for PUT/PATCH/DELETE methods

Author: jjdmol

README.md

@@ -6,7 +6,7 @@
 <!-- ALL-CONTRIBUTORS-BADGE:END -->
 
 It provides a simple Grafana 7.x panel that shows only one button - to integrate with any kind of HTTP/REST API:
-* Support `GET` and `POST` HTTP verb
+* Support `GET`, `POST`, `PUT`, `PATCH`, `DELETE` HTTP verb
     * Adds no new javascript dependencies
     * Uses standard browser APIs and respects CORS
     * Optional text payload for `POST` requests via syntax-highlighiting editor
@@ -38,7 +38,7 @@ Due to the Grafana API & security restrictions in modern browsers the following
 * Neither username nor password are stored encryted in Grafana. 
   The password is there to everyone with access to the dashboard in Grafana! 
 * The *server* at the URL _must_ provide proper resposne to the [CORS pre-flight request](https://developer.mozilla.org/en-US/docs/Glossary/Preflight_request). That is:
-    * Provide a proper response to the `OPTIONS` request performed by the browser before the actual `GET`/`POST` requiest is issued
+    * Provide a proper response to the `OPTIONS` request performed by the browser before the actual `GET`/`POST`/`PUT`/`PATCH`/`DELETE` request is issued
     * Provide a [`Access-Control-Allow-Credentials: true`](https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/Access-Control-Allow-Credentials) header 
     * Provide a proper [`Access-Control-Allow-Origin`](https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/Access-Control-Allow-Origin) header.
       _No wildcards_ are allowed if credentials are used!