Readme updates re: support

Author: vladikoff

README.md

@@ -9,7 +9,26 @@
 
 Visit the [gruntjs.com](https://gruntjs.com/) website for all the things.
 
-### Support / Contributing
+### Support
+
+We support the latest version with security and bug fixes. The previous versions are all end-of-life and will not receive any security or bug fixes.
+
+Our OpenJS Ecosystem Sustainability Program partner [HeroDevs](https://www.herodevs.com/support#request-technologies) provides drop-in replacements for older versions of Grunt that are kept up-to-date for security and compliance issues. Learn More.
+
+### Version Support
+
+| Version | Supported? | Commercial Support                                                      |
+| ------- | ---------- | ----------------------------------------------------------------------- |
+| 1.6     | YES        |                                                                         |
+| 1.5     | NO         | [Available Here](https://www.herodevs.com/support#request-technologies) |
+| 1.4     | NO         | [Available Here](https://www.herodevs.com/support#request-technologies) |
+| 1.3     | NO         | [Available Here](https://www.herodevs.com/support#request-technologies) |
+| 1.2     | NO         | [Available Here](https://www.herodevs.com/support#request-technologies) |
+| 1.1     | NO         | [Available Here](https://www.herodevs.com/support#request-technologies) |
+| 1.0     | NO         | [Available Here](https://www.herodevs.com/support#request-technologies) |
+| 0.4     | NO         | [Available Here](https://www.herodevs.com/support#request-technologies) |
+
+### Contributing
 
 Before you make an issue, please read our [Contributing](https://gruntjs.com/contributing) guide.