chore: announce new sdk on readme (#523)

Author: kevinpagtakhan

README.md

@@ -13,6 +13,16 @@
 
 </div>
 
+# Announcement 📣
+
+Amplitude is introducing a new [TypeScript SDK for Browser](https://www.npmjs.com/package/@amplitude/analytics-browser) [BETA]. This new SDK provides improved developer experience, helps users instrument data more seamlessly and provide more control over data being instrumented using custom plugins.
+
+To learn more about the new SDK, here are some useful links:
+
+* NPM: https://www.npmjs.com/package/@amplitude/analytics-browser
+* GitHub: https://github.com/amplitude/Amplitude-TypeScript
+* Documentation: https://developers.amplitude.com/docs/typescript-browser-beta
+
 # Official Amplitude JS/Web SDK
 A JavaScript SDK for tracking events and revenue to [Amplitude](https://www.amplitude.com).