feat: release first non-experimental version (#528)

Technically we already released 0.3.11, but I think it's good to release
a totally new major(really minor b/c we are under 1) version. I've also
removed the "experimental" from the readme.

Signed-off-by: Todd Baert <[email protected]>

Author: toddbaert

packages/client/README.md

@@ -13,11 +13,6 @@
 [![npm version](https://badge.fury.io/js/@openfeature%2Fweb-sdk.svg)](https://www.npmjs.com/package/@openfeature/web-sdk)
 [![Specification](https://img.shields.io/static/v1?label=Specification&message=v0.6.0&color=yellow)](https://github.com/open-feature/spec/tree/v0.6.0)
 
-## 🧪 This SDK is experimental
-
-The Web SDK is under development and based on a experimental client concepts.
-For more information, see this [issue](https://github.com/open-feature/spec/issues/167).
-
 ## 👋 Hey there! Thanks for checking out the OpenFeature Web SDK
 
 ### What is OpenFeature?