Replaced microbundle with webpack (#35)

* webpack init config

* added configs for node builds

* added typings, removed microbundle

* version bump

* added change log

Author: Denis Gursky

CHANGELOG.md

@@ -0,0 +1,10 @@
+# Change Log
+
+## [v0.6.3](https://github.com/auth0/auth0-spa-js/tree/v0.6.3) (2022-07-12)
+
+[Full Changelog](https://github.com/auth0/auth0-spa-js/compare/v0.6.3...v.0.6.2)
+
+**Changed**
+
+- Replaced microbund with webpack
+  [\#32](https://github.com/RelationalAI/rai-sdk-javascript/pull/35)