Added supported environments to 3.10.0 release notes

Author: sgravrock

release_notes/3.10.0.md

@@ -41,6 +41,12 @@ for more information.
 
 * Test suite improvements
 
+## Supported environments
+
+The jasmine NPM package has been tested on Node 12, 14, and 16. See the
+[jasmine-core release notes](https://github.com/jasmine/jasmine/blob/main/release_notes/3.10.0.md)
+for supported browsers.
+
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 _Release Notes generated with _[Anchorman](http://github.com/infews/anchorman)_