docs(readme): update spec links

README.md

@@ -13,11 +13,11 @@
 
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-A minimal library which polyfills the **ResizeObserver** API and is entirely based on the latest [Draft Specification](https://drafts.csswg.org/resize-observer-1/).
+A minimal library which polyfills the **ResizeObserver** API and is entirely based on the latest [Specification](https://www.w3.org/TR/resize-observer/).
 
 It immediately detects when an element resizes and provides accurate sizing information back to the handler. Check out the [Example Playground](//juggle.studio/resize-observer) for more information on usage and performance.
 
-> The latest [Resize Observer specification](https://drafts.csswg.org/resize-observer-1/) is not yet finalised and is subject to change.
+> The latest [Resize Observer specification](https://www.w3.org/TR/resize-observer/) is not yet finalised and is subject to change.
 > Any drastic changes to the specification will bump the major version of this library, as there will likely be breaking changes. Check the [release notes](https://github.com/juggle/resize-observer/releases) for more information.