Merge branch 'master' of https://github.com/elraccoone/unity-entity-component-system

Author: jeffreylanters

.github/FUNDING.yml

@@ -1 +1,3 @@
-custom: https://paypal.me/jeffreylanters
+custom: 
+  - https://jeffreylanters.nl/donate
+  - https://paypal.me/jeffreylanters

README.md

@@ -34,12 +34,22 @@ Hi! My name is Jeffrey Lanters, thanks for checking out my modules! I've been a
 
 # Installation
 
-Install the latest stable release using the Unity Package Manager by adding the following line to your `manifest.json` file located within your project's Packages directory.
+### Using the Unity Package Manager
+
+Install the latest stable release using the Unity Package Manager by adding the following line to your `manifest.json` file located within your project's Packages directory, or by adding the Git URL to the Package Manager Window inside of Unity.
 
 ```json
 "nl.elraccoone.entity-component-system": "git+https://github.com/elraccoone/unity-entity-component-system"
 ```
 
+### Using OpenUPM
+
+The module is availble on the OpenUPM package registry, you can install the latest stable release using the OpenUPM Package manager's Command Line Tool using the following command.
+
+```sh
+openupm add nl.elraccoone.entity-component-system
+```
+
 # Documentation
 
 ## Getting Started