Add Nyxo to apps (ReactNativeNews#148)

Thanks for adding!

README.md

@@ -8,6 +8,7 @@ To get your project added, please submit a [pull request](https://github.com/Rea
 
 | Title        | Description           | React Native Version  | Last Commit | Github Stars | Links |
 | ------------ |:---------------------:|:---------------------:|:------------:|:------:| ----:|
+| [Nyxo](https://github.com/hello-nyxo/nyxo-app) | Sleep tracking and coaching | ![React Native version](https://img.shields.io/github/package-json/dependency-version/hello-nyxo/nyxo-app/react-native?label=%20) | [![GitHub last commit](https://img.shields.io/github/last-commit/hello-nyxo/nyxo-app?label=%20)](https://github.com/hello-nyxo/nyxo-app/commits/master) | [![GitHub stars](https://img.shields.io/github/stars/hello-nyxo/nyxo-app)](https://github.com/hello-nyxo/nyxo-app/stargazers) | [Website](https://nyxo.app/)<br/> [App Store](https://apps.apple.com/app/id1440417031)<br/> [Play Store](https://play.google.com/store/apps/details?id=fi.nyxo.app) |
 | [NMF.earth](https://github.com/NotMyFaultEarth/nmf-app) | Calculate, understand and reduce your carbon footprint 🌱 | ![Expo version](https://img.shields.io/github/package-json/dependency-version/NotMyFaultEarth/nmf-app/expo?label=expo) | ![GitHub last commit](https://img.shields.io/github/last-commit/NotMyFaultEarth/nmf-app?label=%20) | ![Github Stars](https://img.shields.io/github/stars/NotMyFaultEarth/nmf-app) | [Website](https://nmf.earth/)<br/> [Apple App Store](https://apps.apple.com/us/app/nmf-earth/id1494561829)<br/> [Google Play Store](https://play.google.com/store/apps/details?id=nmf.earth) |
 | [Sh**t! I Smoke](https://github.com/amaurymartiny/shoot-i-smoke) | See Your City's Air Pollution Measured in Daily Cigarettes. Featured on BBC, Huffpost, CityLab 🚬 | ![Expo Version](https://img.shields.io/github/package-json/dependency-version/amaurymartiny/shoot-i-smoke/expo?label=expo) | ![GitHub last commit](https://img.shields.io/github/last-commit/amaurymartiny/shoot-i-smoke?label=%20)  | ![Github Stars](https://img.shields.io/github/stars/amaurymartiny/shoot-i-smoke) | [Website](https://shootismoke.app/)<br/> [iTunes Store](https://itunes.apple.com/us/app/s-i-smoke/id1365605567?mt=8)<br/> [Google Play Store](https://play.google.com/store/apps/details?id=com.shitismoke.app)<br/> [Expo](https://expo.io/@amaurymartiny/shoot-i-smoke) |
 | [MageCart](https://github.com/alexakasanjeev/magento_react_native) | MageCart is an e-commerce app for Magento 2.1 onwards. It consumes Magento 2 REST API to display catalog, products, add products to cart and let you place order 🛒  | ![React Native version](https://img.shields.io/github/package-json/dependency-version/alexakasanjeev/magento_react_native/react-native/develop?label=%20) | ![GitHub last commit](https://img.shields.io/github/last-commit/alexakasanjeev/magento_react_native?label=%20) | ![Github Stars](https://img.shields.io/github/stars/alexakasanjeev/magento_react_native) | - |